1 definition by casmith

rith·me·tic   n. uh-rith-muh-tik; adj. ar-ith-met-ik
noun, slang

a telephone number, generally of a young, attractive female.
Man 1: "Who's that?"

Man 2: "That's Susie."

Man 1: "Man, she's fine...I'm gonna need that arithmetic."
by casmith September 20, 2011
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