The worst insult ever with indescribable punishment for the person it’s used against
Frank: ur dad lesbian
Harold: yeah well ur sister a mister
* frank and his entire family are wiped from the planet along with any memory of them. But the power used for this causes a great lightning storm transforming the whole world into thots. Then Stephen hawking comes back from the dead to begone those thots. Then he immediately dies of 7 different types of Ebola
by Cambunctious March 28, 2018
Get the Ur sister a mister mug.
Ultimate insult, it WILL kill you, watch out! Can only be blocked with a reverse, mirror, or a no u.
Jon: Ur sister a mister.
James: No u
Jon: *Double dies*
by Drillby March 16, 2018
Get the ur sister a mister mug.
You do not want anyone to say this to you. This is the best roast in the entirety of all roasts. Worse than ur mom gay, ur dad lesbian, ur granny a tranny and ur grandpap a trap combined.
Lobster: Yo ur mom gay and ur dad lesbian.
Egg: No u.
Lobster: No u x3.
Egg: *OOF* Well ur sister a mister.
Lobster: *gets engulfed by the sun and dies*
by eat_my_lasgagne_bitch69 March 15, 2018
Get the Ur sister a mister mug.
When some hits you with the ur mum gay you use this and dominate them
Bitchman: Ur mum gay lol
Dickface: (is unaffected) ur sister a mister lol
Bitchman: *digs his own grave and lies in it*
by Big fucking anime titties October 27, 2018
Get the Ur sister a mister lol mug.
this will always beat ur appoinent. this cannot be reversed by “No u
person1:ur mom gay lol
person2:ur dad lesbian

person1:No u
person2:ur granny a tranny
person1:ur grandpap a trap
person2:ur brother a nun
person1:but ur sister my mister
person2:EXPLODES into dust and goes straight to hell
by Slap Razor March 21, 2018
Get the Ur sister my mister mug.
An insult more powerful than "ur dad lesbian" but not as powerful as "ur granny tranny"
"ur dad lesbian" Jerry said to Leo
"ur sister a mister!" Leo responded
*Jerry dies*
by Grendman March 22, 2018
Get the ur sister a mister mug.