an anology used to describe when someone has to pee reallyyyyyyyyyyyyyyy bad because a monkey gets extremely excited while wearing his favorite food therfore making him have to pee
When a woman won't leave a partner or group of friends until she has found a suitable replacement, like a monkey swinging from one vine to another, generally because she can't stand being alone.
Suzie just left Fred and now she's fuckingJohnny? Monkey principle in full effect!