Yo mama is used as a joke to be funny but be careful because if you use it in the wrong way you can get in big trouble.
Yo mama is so dumb she had you.
The phrase "Yo mama" is particularly used by thugs when they run out of insults to use in a fight. The minute they bring dey mommas into the equation, SHIT GETS REEAALL.
Drake: "You can't rap for shizzle."
Meek Mill: "......Yo mama, how bou dat"
yo mama so fat i took a picture of her last year and its still printing.
yo mama
Most people use this phrase to roast or make fun of somebody because if you care about your mom you would be insulted if they started a roast with "Yo Mama"
Guy 1: "Yo Mama so dumb, she bought a solar powered flashlight!"
Guy 2: *in tears* "Wow thanks dude..."
Used as a form of burn. Originally from Ireland with the term u nasty. Now a days the pop culture uses this term to did on each others mama's. Go kill your self for disrespecting the mama's around the world.
"Yo mama so ugly, one direction went in the other direction"
"Yo mama so ugly, she looks like u. The one reading this sentence. Yeah, YOU. Thanks."