little wanker 

When a midget (Preferrably British) masturbates.

He's so short. He's definitely a little wanker.

little wanker by handydan April 23, 2014

Little willie wanker 

A small person. That appears alot younger than they are.
Usually found hanging out with adolescents. Hangs out alot round public toilets.
Has a little willie.

That blokes cock is tiny!
He's a little willie wanker!

Little willie wanker by Jizznote August 20, 2013