HFB is a term which Russians use when they communicate in English. Its English combined with a Russian word because most of them don't speak English very well. It's like holy fucking shit but then like a Russian version.
1) Gholy fucking shit vladimir, why did you do ziz?
2) Boris: Komrad, I bought some vodka, would you share it with me?
Heroin eyes. When the dude you’re hangin out with has been banging up dope and his pupils are really tiny. (Or, you, if you’re not too high to look in a mirror)
He jumped out at the red light to cop, and next time we saw him he was bombed as hell with H-eyes