When one person, usually the girl, wraps their legs around the hips of the guy.

When someone is really bad at something, they're called Koala Dog. Its basically because koalas and dog dont go together.

a piece of Kangaroo meat cut into the shape of "piss flaps" and then tried to be fed to the naive English Pommy

A girl so incredibly significant to you, such as a lover or spouse, that cuddles by wrapping all of their limbs around you, letting you carry them around or just snuggle on a soft surface (soft optional). They are the most perfect people in the world

When your friend jumps onto you and holds onto you like you are a tree. Your friend wraps his/her body around the side of yourself.

When you crawl and hold someone like a Koala bear hold a onto their mother

Where you latch yourself to your significant other in an attempt to hold on (cuddle closely) as a cute koala would to a eucalyptus tree. Also koalaing refers to holding on to something very tight or someone as if dependent, or cudding by wrapping your arms and legs around the person as if they were a tree.