look up any word, like bae:
 
1.
1. To "tell" or "serve" someone/if you got something right, and prove someone wrong, you say it.
Example: BUYA! I told you the answer to #4 was 234!

2. When what you have to offer, etc., is better than another persons/when you or your possesions is better than someone else's.
Person 1: I got FIVE computers!
Person 2: Guess how many I have?
Person 1: 2?
PErson 2: NO! 14...BUYA!!!
Person 1: 2+2=5.
Person 2: NO! It's 4.
P. 1: Show me.
P.2 (counts on his fingers and shows the person)
When P.2 realizes that 1 understands,
Person 1: BUYA!!!!!!!! I was right!!!!!!!!
 
2.
alternative spelling for booyah. an exclamation of joy or excitement.
Buya, that's my 1024th post on the forum!
by heindsight September 08, 2006