The ultimate form of the worst words to be used, even greater than "ur mom gay";"ur dad lesbian";"ur granny tranny" and "ur grandpap a trap". Those words can hurt a person emotionally,physically and psychologically.

David: ur mom gay lol
Frank: no u
David: ur dad lesbian
Frank: ur granny tranny
David: ur grandpap a trap
Frank: ur sister a mister
David: *explodes into oblivion and his soul is being eaten by minecraft youtubers*

ur sister a mister by urmom_gay_slayer_no_u_xddd March 15, 2018

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Ur sister is a Mister

Infinite times worse than ur mom gay

Dave: Ur mom gay
Kieth: Ur sister is a mister

*alternate reality gets destroyed*

Ur sister is a Mister by Big Sex 2678 March 12, 2018

Ur sister is a mister

The insult searched for in the depths of Volcanos, anytime this is used an alien race is wiped from existence

1: ur mom gay
2: ur dad lesbian
1: ur granny tranny
2:ur grandpap a trap
1: ur sister is a mister
*zarblorgs fuckin die*

Ur sister is a mister by Penis 10 inch haver March 14, 2018

Your Sister a Mister

Only used by the almighty, worse then your mom gay and everything else

Caleb:Your mom gay
Kyle:Your dad a lesbian

Caleb:Your granny tranny
Kyle:Your gramp tramp
Caleb:I'm sorry but you have insulted my to my boiling point and now I'm afraid I have to use a forbidden phrase upon you
Kyle:Do it pussy
Caleb:Your sister a mister
Kyle:Just fucking melts

Your Sister a Mister by NippleringBitch March 15, 2018