knuckle tat 

A trashy placed tattoo that could be a lot more original

Did you see his knuckle tats? How distasteful

knuckle tat by let's.be.honest December 28, 2014

moose knucklette 

a tiny or "baby" moose knuckle on a midget, short person, or youngin'

"hey look at that midget wearing yoga pants, lol you can its moose knucklette"

moose knucklette by justanothervictimoftheghetto May 10, 2010

knucklerat 

Anything you could possibly imagine

Can be used in any context

It is mainly used as in insult such as

Dumbass

God i hate trevin he is such a knucklerat

knucklerat by Adub11797 November 18, 2015