Cocaine, coke, blow, crack, white powda, rocks, magic rocks etc.
Oh look what came in the mail, a scale and some arm & hammer - Outkast

I got to make a million ... using no flows, just arm & hammer and four o's - Nelly
by Robin Pocket May 9, 2004
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When you put your penis in a girl's (preferably shaved) armpit and proceed to fuck it.
Miles: Would you have sex with an HIV infected girl or would you have a guy fuck your ass?

Me: Any kind of sex? Cause I'd Arm & Hammer the shit outta her.
by rolfmcphearson May 22, 2010
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When a male masturbates with one arm more than the other causing it to be muscularly bigger than the other one.
Guy 1: "Yo whys your one arm so big son?"
Guy 2: "Ahh i got Hammer arm, i jackoff with my dominate arm more then the other one so it's just uneven."

Guy 2: "Sounds like you needa switch it up a bit man."
by killerseemroe January 7, 2012
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Slang for the crime of selling sham CDS (Controlled Dangerous Substances). So called because of the use of baking soda as fake heroine or cocaine due to similar appearance. Considered fraud and distribution of drugs in the eyes of the law.
Man, Dooky got caught selling that baking soda as dope, dawg; might be locked up for three years behind the damn Arm 'N' Hammer charge...
by Bigg Sexx December 10, 2010
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During the act of fellatio, right before climax, the man slams his fist into the top of his partner's head.
Son, take the wheel while I give your mother a Michigan Hammer-arm in the back seat.
by Atherious March 16, 2019
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