What's on your mug?

Stands for keep your socks. It means stay safe in British slang.

"See you later. Keep your socks!" - KYS

By JacksonLewis

KISS YOURSELF 😘😘

Ashley: i'm never sending pics of me again because ur a fucking cunt Miles: kys

By boywithaskull

Know your shirts.

'Mate that's a sick polo you got there bro' 'Do you see any buttons? It's not a polo, KYS'

By Chillichellios

kys is an acronym that stands for: K̲iss Y̲our S̲ister

Anon #1: Why do other anons keep telling me to, kys? What does it mean? Anon #2: They want you to, kiss your sister! >-< Anon #1: Oh cool, I'm going to go kms!

By Anon987987448

There is only ONE definition, it means Keeping Your Sanity.

Yo, KYS

By 111000111