Top Definition
Rust, particularly of cars.
Joe's old Caddilac was riddled with steelworm, thanks to the salt roads from too many Minnesota winters.
af boggah 8. august 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!
af steeleworm 4. marts 2012
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