What does it mean when someone says, “fuck you and your momma”?

[LinkxPeach]

I heard from a few videos online on YouTube, when a guy named “TheBlackHokage“ was trolling White people on Call of Duty, and other games and one of the trolling victim says, “fuck you nigga! Man, nigga fuck you and your momma!” Snoop Dogg sent a message to some racist guy about sports or something and he says, “fuck you, your momma, and everything connected to you, you racist piece of shit. Fuck you!”
Some guy made a song about bitch ass niggas, and says, “fuck you, and your momma for fucking your Dad, and having your ignorant bitchass.”

[Newhead]

Lmao, that was fun to read. He meant what he said and said what he meant, what's there not to understand? When you hate someone you may actually hate the woman responsible for bringing you here and the daddy for not wearing a condom, it be like that sometimes. I mean it's really not nice to say these things but people get mad sometimes and go off denouncing your existence.

[Anonymous]

It means exactly what it sounds like. People tend to get defensive when you insult their mom. That's why "your momma so fat" jokes exist. Or "I fucked your mom" jokes. Most people love their moms.

[In_Trance]

It means he likes threesomes?