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1) A heavy metal with several industrial applications.

2) Something, normally musical, that can be described as very heavy.
I saw motorhead last night and Lemmy's base sound was just osmium.
by black flag June 01, 2004
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2
A low-quality teenager who spends all of his time on the fucking internet
Fuck, It's Osmium again
by Osmium23 October 09, 2017
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3
The length of time in which your girlfriend's gay roommate can do whatever, whenever, to your mouth, cock, ass, balls, and shaft and you can't tell him to stop.
Damn Stephen, can't wait for you and Adam to Osmium.
by cunds002 April 06, 2018
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