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.
"My girlfriend is so good at koalaing, she can hold on even when I walk up the stairs."
When you non-stop cuddle under blankets with someone you like. Men are the eucalyptustrees & women are koalas wrapping their hands over men. "Every koalas dream is to own its own eucalyptus tree."
1#: Where do you think these 2 lovebirds have been for so long?
2#:I bet they are still koalaing.
To sneak up on someone and jump on their back in a koala like fashion. NOTE - before doing it to another guy make sure both of you are mutually hetero.
*friend walking*
Me: on this episode of you just got koalaed im going to sneak up that rare specimen right there
Friend: *guard lowered* *whistling*
me: *pounce on his back and completely subduing him*
Successful koalaing