Top definition
a really fat kid who gets on everyone's nerves and cries when your class is late to lunch, or he doesn't get a grilled cheese sandwich!
beth was acting like a complete selwyn when we wouldn't talk to her.
by emoyuki July 10, 2008
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Donkey Punch Plush

10" high plush doll.

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2
A Selwyn is pretty much when someone tells you they're going to do something, then either doesn't do it, or just completely fails in that sense, usually ruining that section of the day or just making it annoying to be around.
It is a worse version of admitting defeat or a gg, which is what the concept was first derived from.
Guy #1 "Remember that time Selwyn did a Selwyn on us?"
Guy #2 "Don't remind me."
by Selwyn February 08, 2008
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Cleveland Steamer Plush

The vengeful act of crapping on a lover's chest while they sleep.

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