Top Definition
Rust, particularly of cars.
Joe's old Caddilac was riddled with steelworm, thanks to the salt roads from too many Minnesota winters.
door boggah 8 augustus 2016
When you slap someone (most likely a girl) in the face brutally with a hard cock.
"Dude she got steelwormed so hard, her nose started to bleed!
door steeleworm 4 maart 2012
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