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
A phrase normally used when an outsider tells you something crazy that just happened but in actual fact it is a common occurrence in your strange fucked up life and just like any other day.
Phil - "Holy crap! Geoff just tripled himself in the middle of the parking lot!"