Mut standard time (MST) is used to describe people from a certain friendship group always arriving somewhere 30 mins - 1 hour after the scheduled time.
“We all agreed to be here at 4:30, where is max?”
“He’s probably following M.S.T. (Mut Standard Time) so he’ll be here at around 5:30”
“He’s probably following M.S.T. (Mut Standard Time) so he’ll be here at around 5:30”
by jimmyt01 October 19, 2021
Get the M.S.T. (MUT Standard Time)mug. by Tegdirbthe September 1, 2018
Get the Mut snotmug. 
She called him a mut because he begged her to be with him
by Sopihg November 24, 2020
Get the Mutmug.