The art of stumbling around drunk with arms swaying in front to keep ones balance in check and to keep from falling over in a drunken slumber.
That motherfucker was so blitzed that he was gorilla walking around the club last night.
To climb up the stairs on your knuckles and feet. Used to save a little energy or because you're a lazy fatass. Either way, it makes you look like a gorilla.
Simon's mom always trained him to gorilla walk up the stairs because it was his favorite animal.