When a man marries a woman, and proceeds to perform bedroom antics with his wife's sisters, because this guy is void of any kind of moral compass, and/or is just a complete douchebag.
Girl - "I can't date that dude, he's such a Sinister Stanley!"
Girl - "Did you hear about Dave? He totally did a Sinister Stanley on his wife".
Man - "I have so much respect for Brian. He Sinister Stanley'd the shit out of his wife!".
Girl - "Did you hear about Dave? He totally did a Sinister Stanley on his wife".
Man - "I have so much respect for Brian. He Sinister Stanley'd the shit out of his wife!".
by DirtyDave2.0 August 13, 2022
Get the Sinister Stanleymug. a loud mouth short and the worst secret keeper ever john Stanley someone whos not romantic sometimes funny and the worst liar ever no one likes him also he is the ugliest shortie on earth
wow whos that ugly short freak over there
who the one with the loud mouth that no one likes
yes who else
oh that's John Stanley
who the one with the loud mouth that no one likes
yes who else
oh that's John Stanley
by mbdog123 July 22, 2016
Get the john stanleymug. 
by SirStandeman October 17, 2020
Get the Stanley Richmug. by Paul Phinebaum January 6, 2024
Get the Stanley Steamermug. 
omg its Stanley the guy from Fortnite
by Moma suckaaaaa March 31, 2023
Get the stanleymug.