battle Mercy

A Mercy (a healer in Overwatch) that, instead of healing, shoots with her relatively weak gun, undermining the support the actual DPSs receive.

Don't go battle Mercy, please! We need healing!

I'm going to play battle Mercy because somebody needs to take care of that Zenyatta.

Pskov poop

A Pskov poop is when you afk, spin in spawn and take a shit at the same time

Me: I'm gonna go for a Pskov poop
Friend: Okay, I'll camp here *buys autosniper*
*gets easy ace*
Friend: ez

Birakan

a small place somewhere deep in Russia, in the Russian Far East. goblins live there.

But Mom, I don't want to go to Birakan! I'd rather go to Detroit!

subset

A set A is a subset of B if all elements of A are also elements of B. In other words, A is contained in B.

The set of natural numbers are a subset of the set of real numbers.

лицо

лицо́ (licó) - 'face' in Russian.

Твоё лицо́ краси́во. (Tvojo licó krasívo.) - Your face is beautiful.