Top Definition
Must-be meaning "Must Be Nice" derived from B.C. days dating 2008 to 2010.

Sources confirm that the expression came from Jeffrey Johnston's work ethic.

Applicable when:

ISRs come in late,
ISRs leave early,
ISRs take time off,
ISRs take a 2-hour lunch,
ISRs get a commission check,
ISRs take 2 lunches for the day,
ISR sales-kick offs,
If you are Jeff Johnston, Zadies for the ladies or Joe Lando

Working at a steakhoue
if you have Bill Ng's job or tattoo
Fiel got a new sticker on his BMW, Must-Be!
by ISR4life June 22, 2010
referring to an emo kid
a weird or goth type kid walks by and someone says... he must be emo, or.... must be
by d-street November 02, 2008
abbreviation of the sentence. They must be emo
bunch of emo or weird looking kids are walking by, and someone says... must be
by D-st October 03, 2008

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