One way to insult someone is by telling something false of their mother, as a form of negative comment.
Hey, that kid who was older than me, said some mean things about my mamma because I had $50 and he had $10. He said "Yo Mamma is so ugly, when she looked out the window, she got arrested for moaning.". What should I do? I didn't do a thing wrong!
An insult given to another person in an argument. It is commonly used on a person who has talked smack and or is being a smart ass.
Both sides can give the stacks, which will escalate to a bigger argument. However, it is not uncommon for one person to be the only one throwing the stacks.
Matt: Damn, man! Does your mother still dress you in the morning?
Avery: Woah! You're about to catch one. I'm about to give you the stacks.
Your forehead looks like a fucking Honda windshield.
Matt: Alright man, Chill. Chill.