3 definitions by LesleyDianna

It means acting nuts.
To be a crazy person.
Matt: Oh, I can't believe you just jumped off that 80 feet building! You must be off your rocker!
by LesleyDianna February 22, 2012
To punch someone in the mouth to shut them up.
Tom: you're just jelous of me cuz I slept with your girl and you didn't. And y'know what? she liked it so much that I...
Edd: IF YOU DON'T SHUT UP, I'LL GIVE YOU A KNUCKLE SANDWICH
by LesleyDianna February 22, 2012
An idiot.
Usually used by british people.
Lea: I think I'm in love with Joe.
Sarah: but he's Kristens boyfriend! and she's your bestfriend!
Lea: Yeah, I know but who cares?
Sarah: oh, you are such a numpty.
by LesleyDianna February 22, 2012

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