Quote Originally Posted by JB
But when something is the best......
"IT ROCKS!'
This one wasn't adopted in Russsian slang, but the opposite did.
Sucks (sux) - суксь. Not used a lot though.
BTW "rules" as an adjective can be used not only as "рульный", but also as "рулезный".
Some more slang words: http://www.paco.net/~odessa-mag/slovar/