Hung like a gerbil 

Someone with an extremely small penis.

Dude, is that a tic-tac in your pocket or are you hung like a gerbil???

Hung like a gerbil by Disco Stud April 29, 2003

hung like a bull gerbil 

It is simply the opposite of being hung like a gerbil. A man with small genitals. But if he says it about himself he is a confident man who hits the G-spot everytime.

I am hung like a bull gerbil, i hit the g-spot everytime.

hung like a bull gerbil by thefunnybrothers November 4, 2013

hung like a retarted gerble 

some who is unusualy large for thier body size

People always said he was big but look, hes hung like a retarted gerble, its gotta be 7" around

MY Boyfriend ,NOT yours

hung like a retarted gerble by T.D.B. March 26, 2008