a) (humorous); what you do when when you come out of the shower and you are too bloody lazy to use either a towel or a blow dryer to dry your hair
comme du monde and you just shake your hair all over the place, literally like a wet dog, hence the name
b) (
drug addiction) : episodes of literal uncontrollable 'wet dog shaking' characteristic of drug addicts undergoing
withdrawal symptoms, especially withdrawal from heroin or cocaine.
mother: Stan, why the hell is the bathroom floor wet again?
Stan: lol, don't ask stupid questions, you won't receive a stupid answer. It's lol because I just did wet dog shakes; I was to lazy to use a blow
dryer.
mother: Stan, I hope this wasn't
f-sag. Now go take a
mop and mop the bathroom floor