Ksmk 

The abbreviation of the Arabic word “Kos-Umak”, which literally translates to ‘your mother’s pussy’. The word has been used in recent urban english.

Friend 1: “I saw Moe yesterday at the shop. I wanted to smack his ugly face”
Friend 2: “Ksmk, don’t ever mention Moe, he’s my homie”

Ksmk by Himynameisking January 18, 2021

KSMK, NMSL 

The abbreviation of "Kan Shen Me Kan, Ni Ma Si Le", which means "What the fuck are you looking at? Your mother is dead!"
Originally said by a Chinese gay guy named Yingting Zhou, when he was defending his Taiwanese pop idol Jolin Tsai. This sentence and Yingting Zhou got famous in various Chinese forums, eventually Chinese gays created an online persona, a female version of Yingting Zhou, named Yinting Zhou (周阴婷). Soon some Chinese gays started photoshopping Yingting Zhou's face on various pictures and telling people this is Yinting Zhou, and constantly subtitled "KSMK, NMSL".

I saw a guy peek at me yesterday, and I immediately yelled back "KSMK, NMSL", just as fierce as Yinting Zhou.

KSMK, NMSL by Sibiriingerel November 29, 2019