hung rat
The act of forcefully pinching one's cock and balls between the legs, then displaying the entire mess posteriorly to unsuspecting onlookers. When performed properly, the pinched junk appears to be a strangulated rat hanging from the performer's ass. See also: fruit basket
Although we were humiliated when the boat full of cheerleaders mooned us, we felt redeemed when Brad countered with a fearsome hung rat.
hung like a rat
Often when men suffer from having a small penis they compare their length to an animal with a smaller penis.
The girls make fun of Mr. Nader's penis. "He is not hung like a horse he is hung like a rat!"