One of the most important parts of understanding or speaking a language is vocabulary. Here is a list of useful vocabulary in the Russian language.

Привет ( privet ) | Здравствуйте ( zdravstvuyte ) - hello
Б*ядь (blyad') - f*ck
с*ка (suka) - b*tch
с*ка Б*ядь (suka blyad') - f*cking b*tch
г*вно (govno) - sh*t
это (eto) - that is/this
под (pod) - under
на (na) on (an object)
брось (bros') - drop
купи (kupi) - buy me
этам (etam) - over there, (note: the translation is wrong, on Google translate, in the Russian Federation it isn't used.)
Спасибо (spasibo) - thank you, (note: once again the translation on Google is wrong, in the Russian Federation it isn't used.)
до свидания (do svidaniya) - see you later, bye, peace, see ya, etc.

Note: Sorry for all of the *'s in the words and translations, Steam won't let me put the in full.

Another important thing in learning a language is to know useful phrases in a certain situation, this situation is CS:GO.

как дела (kak dela) - how are you
справа от вас (sprava ot vas) - to your right
слева от вас (sleva ot vas) - to your left
кинь смок туда-(kin' smok tuda) - throw smoke there
кидай молотов туда (kiday molotov tuda) - throw molotov there
бросить гранату туда (brosit' granatu tuda) - throw grenade there
бросить туда приманку (brosit' tuda primanku) - throw decoy there
брось туда флешку (bros' tuda fleshku) - throw flashbang there
Давай на (A, B, Mid) (davay na) - go to, let's go, come on, (A, B, Mid)

I hope you've found this guide useful. If the bloke starts yelling, yell back in Russian. If you want to talk to him further, then use Google Translate, but I warn you, their translations may not be correct or up to date, sometimes. Anyways, до свидания б*ядь.

Note: You may think that I'm wrong, because Google Translate, translates something differently. The thing is Google translates directly, meaning if you want to say d*ckhead in Russian, it will directly translate, and practically mean d*ck on head, instead of the proper term; х*й (huy). I've spent time with Russians, and learned from them. As well I've spoken with Russians in the Russian Federation as well as been in the Russian Federation.