sin

When two human beings (same/different sex) have a child.

Jenna: My mom is having a baby!!!
Ria: omg another sin
Jenna: Stfu hoe

Kys

When you feel an urge to tell another idiot to kill themselves.

Person 1: Someone keeps accusing me of bodyshaming on Twitter.
Person 2: Well just message them "Kys" and your problem will be gone.
1: Alright. "Kys SINVIA."
2: Attaboy.