A man pulled a midget at a bar, but when they got back to his place he refused to have sex with her. He got out a flesh-light (see lovehoney.com) and said, "Sorry, love, I don't do midgina's."
Used to describe someone who is extremelydesperate for sex but highly unlikely to get any due to being a dead ringer for Bill Gates aged 14 and female.
Fred: "Hmm,(hic), she's quitetasty."
Joe: "Take your beer goggles off mate, she's minging!"