must be 

referring to an emo kid

a weird or goth type kid walks by and someone says... he must be emo, or.... must be

must be by d-street March 14, 2009

must be 

abbreviation of the sentence. They must be emo

bunch of emo or weird looking kids are walking by, and someone says... must be

must be by D-st January 16, 2009

Must-Be! 

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!

Must-Be! by ISR4life June 24, 2010

must be tuesday 

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!"

Kevin - "It must be Tuesday."

must be tuesday by Alekso Schmekso June 7, 2016

Must be nice 

The world's most condescending phrase.

Girl: I'm getting fucked up tonight!
Guy: Must be nice.

Must be nice by mcnatty December 10, 2010

Must be that damn phone

Every 40 year old facebook mom’s excuse when there child gets hurt, sick, whatever.

Mom! I broke my leg!
Mom: must be that damn phone

Must be that damn phone by 7point92x57mauser March 9, 2020

Must be an enemy stand

Explanation of everything

*happens some weird stuff*
Jotaro: That must be an enemy stand!

Must be an enemy stand by Zurg0_omania March 14, 2018