n. used interjectionally in greeting in place of the word "yo" originally coined to belittle hip-hop "culture" this word has risen above and beyond it's intentions as it is now adopted by the sect it is used to ridicule. archaic: a singing style popularized in the mountain regions of Europe.
adj. having the potential to ruin the faces off those who oppose you. an action or circumstance marked by a sense of despair. an object that is highly desirable, to the point of causing extreme jealousy in others.
"dood, back up... i got a ruinous backhand and you're testing my limits"
"in a ruinous turn of events, Ryan's dad decided to accompany the young couple on their camping trip."
"omg man... this chocolate cake you made... it's effin ruinous"