To start conversation with someone, preferably to make a better realationship with someone, i.e. learning about them. Usually laughing and serious talking going down.

Can be a long period of time or short, usually between two people who don't really know eachother that well.
Where'd Shanice go?
Oh she over there buildin with that boy we met last night.

Geneice on a date with that boy AC.
Oh forreal? Uhuhh they will not build without us knowing!
by Santia March 13, 2008
1. When you walk in the room and your pretty well known and everyone likes you and wouldnt make fun of you for being a retard then you say (nickname) is .......
ex.1. Beau- *walks into room*
Beau- (nickname) In Tha Buildin'!
J-Murda- awwww snap ders dat kid
T-Money- Man dat boy right thurr is hella sick wit it
Ladies- Man he is fine ass hell i tell you what

by BEAU "B-UNIT Fa ShO" November 9, 2005
A slang phrase used by weightlifters to question what muscle group they are working on, and how much weight they are capable of lifting.
Bruno, watcha buildin today?

Dude, workin the pecs. Peaked at the 300 club and now I'm workin my way down. Can I get a spot?
by DA_OA April 7, 2010
The act of building a building

If someone is buildining they are building a building, simple
Billybob:"Hey mate, whatcha doin?"

Bob the bulider:"just some buildining
by Mooroo320 March 13, 2022
When a teacher gives you several facts, and challenges you to link them somehow,

When you can't link them, and he/ she tells you how they are linked

What the people do to get beer in a Budweiser commercial
Teacher: " How are these two things related? BUILD SOME BRIDGES!!"
Students: " ?????"
Teacher: "alright, i guess we'll have to start Buildin' Bridges"
by Monday Rice February 13, 2010