Top Definition
v. to overcome challenging/horrific situations without giving up or giving in. to face adversity in the style of a marine

derived from the marine credo "semper fi" meaning always faithful
weenie 1: oh man, i don't think i can go in to work, i am so hungover.

stud 1: dude, semperfy, you need the paycheck.
by hellzbelle December 06, 2010

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