To move swiftly twoards someone by moving side to side with your arms out like a monkey and then once you reach them to kick them as a monkey would.
During the crazy sleepover, the man attacked the annoying boy by chasing after him and Monkeykicking him.
A jumping front kick usually coming from a smaller person against a larger foe. This quick style of kick usually takes the opponent by complete surprise and they often end up scratching their heads while trying to figure out how they ended up on the floor.
Nadya will monkeykick your ass right out that window.