The slang term GWAF is used in online chats and text messages to express extreme amusement about something, in a generally crude manner. It is usually used when something is very funny - in a lame kind of way.
It stands for Getting Weak As F**k (from laughing so hard).
It's similar, but less common than LOL (Laughing Out Loud), LMAO (Laughing My A*s Off), or simply Hahahahah (a simulation of laughter written out in text).
One might text a friend and say "You've got to see this YouTube video I just posted on Twitter, I was GWAF!"
There are also a few non-slang acronym definitions for GWAF:
- Garden Writers Association Foundation
Grant Wood Art Festival
Golden Wheel Awards Foundation
Genetic Weight Adaptation Filter
Green World Art Festival