You may use "fuck Your Mother" when your in a really deep conversation and out of know where you say "fuck your mother" super fast and then you say "did you say something".
Ruben:Blah Blah Blah I wanna fuck the bitch.
Kevin:"fuck your mother".
Ruben:What? Did you say something?
Kevin:No. Did you?
Ruben:No.
back to conversation
this is legitdeadass the worstest insult you can use on someone,worse than your mom gay, your dad lesbian and your granny a tranny say it out loud and every nigga within a 17 feet radius just dies as they hate their brother being their mother
john: your granny a tranny
you: oh yeah well your brother your mother
john: fucking dies