when someone is trying to explain smth to you but you don't understand, so they give up cuz they are done with you
person: hey do you wanna go to that concert?
person1: concert? whos? when ?
person: taylor swift. tomorrow.
person1: oh but I have a project due tmrw and I think I can adjust but--(bla blah blah)
person: nm, I should have stfu
person1: concert? whos? when ?
person: taylor swift. tomorrow.
person1: oh but I have a project due tmrw and I think I can adjust but--(bla blah blah)
person: nm, I should have stfu
by myeongli December 5, 2021
Get the nm, i should have stfumug. STFU, (shut the fuck up), is a word commonly used in texting and online chatting systems. It is to tell a person to be quiet and don't talk because your tired of them.
Although Kevin is usually funny, he made a very bad and offensive joke, and his friends told him to STFU.
by jacktheripperishere677 February 16, 2022
Get the STFUmug. by Bubble_Productions08 November 23, 2019
Get the Stfumug. A phrase used when one simply can not come up with a proper comeback.Can also be used when scared or simply embarrassed to try and dissolve the situation (fails often).Commonly used by -north korean genesis (aka eduardo el culito)
by xxXbelieberXxx June 17, 2022
Get the Please stfumug. 
Stfu means shut the fuck up....
I'm playing fortnite stfu
by Learn something new everyday February 17, 2020
Get the Stfumug. by _basicbxtch_ April 23, 2019
Get the Stfumug.