Lankey Mankey 

The action in between hard and flaccid when your dick hangs down just like monkeys arm

Damn man yesterday all day I was pulling a lankey mankey

Lankey Mankey by Logan boden November 3, 2016

Lanky Monkey 

Some one with long arms and looks like a monkey facially.

That kid looks like an Lanky Monkey

Lanky Monkey by Grifflas May 3, 2010