Short for hydrogen atoms, for when you get tired of saying it multiple times, or for when "hydrogen atoms" is too many syllables to fit into a rap lyric.
Forget nitro! My ride needs somethin' more. When I get to pimpin' these wheels, I'm goin' for hydroms, yo.

Josie was in for a nasty surprise when what she thought was a helium balloon turned out to be filled with hydroms.

Water? That's just the shit that comes out when hydroms link with oxygen in a kick-ass exothermic reaction.
by The Jive Chemist May 24, 2005
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