Top Definition
accronym for Not Together Still Mine, would apply to someone you like and would get angry if anyone else tried to date even though you are not together.
person: wow Jake is looking hella fine
other person: back off brah , NTSM
person: okay okay
by mytamponsfallingout February 21, 2014
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.