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1.
Belmet is a cross between a helmet and a bellend.
That Kev is a complete belmet
by Bernie Blunt November 30, 2004
 
2.
Quite simply a cross between a bell end and a helmet.
.....Ooh, I caught my belmet on the fence as I hopped nakedly through next doors garden.
by Bulbatross December 11, 2007
 
3.
A short fat woman with a bowl cut. Usually lives in a cave and feeds off young schoolchildren
School kid 1: Belmets hungry

School kid 2: better stay away from the cave
by BErt July 03, 2012
 
4.
A Helmet designed for your boob. Usually plural as most people have 2 boobs.
Girl #1: My boobs aren't adequately protected :(

Girl #2: WEAR BELMETS AND ULL LOOK COOL WHILE RECEIVING ULTIMATE PROTECTION :)

Girl #1: gee thanks! my life is now complete!
by CoinedByS&J June 24, 2010