1. To say something uncalled-for or rude
2. To say something for the purpose of instigating a strong (possibly negative) reaction
3. To speak lies behind a person's back
4. To make empty threats
1. "Damn your mom was good in bed last night"
2. "You're ex-boyfriend told me that his vacuum cleaner can give better head."
3. "She sucks all her boyfriend's friend's dicks!"
4. "I'm gonna break your kneecaps open and make you drink the fluid"