The further degredation of the English Language deriving from (What up?) Waap is pronounced however the speaker feels, a quick Waap is possible, or a prolonged throat gargling sound can be made, it's your choice.
waap : expression of joy, happiness, amusement or excitement. usually used in games such as counter strike source. any number of A's can be added to the middle of the word depending on the excitement or joy of the person using it.
bloke 1: Dude you just won the lottery
Bloke 2: WAAAAAAAAAAAAP
Guy 1: Dude u pwned that guy
guy 2: I know, waaaaaaap
Dude 1: Dude that guy just fell off that bridge.
Dude 2: Dude i saw, waap