Learn the Lingo

Check here if I use a word you don't know. 
Will add more, the more I learn.

Basics
Belay - The action the person at the bottom is doing when they are either giving out/taking in the rope of the climber through a belay device on their harness. Make sure you pick one you can trust.
Beta - Advice shouted at you from the ground, sometimes as useless as 'be taller!' or 'try harder!!!'.

Crag - A steep or rugged cliff or rock face. Show that you're a real climber by using it as a pre fix to other words, like 'I'm just gonna have a quick crag nap', or 'oh look a crag dog!'.
Flash - Finishing a route on the first try. Believe it or not, I have actually done this.

Prim Con - Prime climbing conditions.
Prim Con 1 - Mega prime climbing conditions.
Problem - The name for the route your working on. If someone says, 'what's your problem?' don't get offended too soon.
Pumped - 
Psyched - 
Route - The name for the path taken to complete the climb in rope climbing.

Send - To complete a route. If someone asks you if you've sent anything today, just say yes.

TAKE - this is what you shout to your belayer if you just need a flippin' break, they will take in the rope you can just hang there for a bit and shake everything out. You can actually shout it every time you clip in and they actually have to.

Moves
Bridge - To climb using two walls/rock faces that are less than 180° to each other.

Bump

Campus - Climbing without any using feet. Just showing off really.
Cheesegrater - a sliding fall on a slab where you hit everything on the way down. V painful.

Crux - the hardest move in a climb. Ha, like they aren't all hard.

Drop Knee - dropping one of your knees lower so you can twist in and get a longer/higher reach. A lot more helpful saying this than, 'grow!' when giving beta.

Dyno - Where both your feet leave the rock while you catch the next hold with your hands. Literally just a fancy word for jump.

Flag - where one foot is on a hold and the other leg is out to the side for balance.

Heel hook - hooking your heel into a hold. Just try it out when totally unnecessary to look like a pro.
Jam - Just jamming your hand into the crack in a rock and hoping for the best. 
Match (Hands/Feet) - To have both hands/feet on the same hold. Make sure you've learned your left from you right for this kind of beta.

Pop - 
Sit start - Starting a climb from sitting down. Effort.
Smear - Using the friction of your shoe against the wall in the absence of any holds. Doable if you trust your feet.

Toe hook - Hooking the upper side of your toes into the rock. You could have predicted this one from the heel hook one right?

Traverse - Climbing across, rather than up. Don't traverse too far away from the bolt though because that is very scary.

Holds
Arête - An outward facing corner on a rock.
Crimp - A hold you can only grip onto with the tips of your fingers. Not a fun one.

Jug - The best, most friendly, kind of hold.

Pinch - a type of hold that you have to pinch. Funnily enough.

Sloper - A hold with very little positive surface. Very little positive.
Slab - Low angle hold, quite large and rounded. Not the nicest but also not a crimp.

Undercling - A hold which is gripped with the hand facing upwards. Good when you are standing up.

Gear

Clipstick - A piece of gear which allows you to clip quickdraws in to bolts from the ground. Like a really long arm.

Quickdraw - What you use to clip into the bolts in the rock in lead climbing, definitely make sure these are on your harness before you start.
Sling - A loop of heavy duty fabric essential for lowering off at the finish of a lead climb. You are pretty safe on it even thought it might not feel like it.

Grades
V(1, 2, 3 etc) - Bouldering Grades, easiest being VB, then V0, V1, V2 etc.

Types of Climbing Approach - The path or route leading up to your climb. Use this to sound fancy when you're walking metres from the car to the rock. Also the approach can be more terrifying than the climb.
Boulder - Climbing closer to the ground without the use of ropes. Inside, the floor is made from crash mats, outside a crash mat should be taken along. Instead of belaying, you should have someone to spot you/give you beta.
Lead - Where you clip your way up the rock and lower off from the anchor at the top. Your belayer gives out rope to you as you climb. Not as jolly as top rope, but you feel more like you have actually achieved something.
Top rope - Climbing where the rope is already secured at the top of the route, and the belayer takes in rope through the climb. Lovely. So safe all of the time. No chance of big falls.
Scramble - Climbing midway between hiking and graded climbing.
Sport
Trad
Free Solo