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1.
an expression showing amusement. Usually at something embarrassing, stupid, or something that is completely amazing. It can be at anything, but mostly used for something being really dumb. This word was originated from Flavor Flav.
"waaaaow! you hit it like a true G bruv!"
"wa-wa-wa-waaaaow! dude how did you dunk on him? that was just fuckin amazing"
"waow dude, you bought the wrong pack of whisks"
"haha waaaow! look at what that dude is wearing"
by PropaGanjaHitsBruv July 25, 2009
 
2.
you use it like the same way you use wow but for something that is more exciting and deserves a better response than just a wow.
Boy: I just failed my test
Girl: WAOW!!!
by Rachel Goldenberg May 01, 2006
 
3.
A noise made usually by irritating individuals who drive clapped out Volkswagons. A stupid and opinionated person with ginger hair
WAOW you can't drive and I can!!! WAOW!!
by Dr Dock December 01, 2003
 
4.
Used by a Wanker, Who has no 'real' friends or life.
1)
ERRRRRrm L*** says were going to Guildford WERE GOING TO GUILDFORD! wwwaaaaooooowwwwwwwwwwwwwww!

2)
Moooooorrrningggggg Gaaaaaaaaayyyyyyyyyyyyyssssss Wwwaaaaaaooooooowwwwwwww!
by Groove Armada January 04, 2004