1 definition by psychologicalromance

acronym for "shank my face" or "shank me in the face". commonly used to express disappointment.
person 1: "dude i just found out we have a math test today.."
person 2: "ugh SMF"

person 1: "ew here comes Vickie.."
person 2: "SMF"
by psychologicalromance December 23, 2010
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