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

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