Top definition
The most intense level of fucked up that a person can get; when a person is so savage that he/she goes beast mode on everything in sight.
-Did you see Josh last night? He punched the wall and was threatening everyone.

-Yeah, man. He was pretty riffed up.
by bigdaddyfrat6969 May 06, 2011
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2
A song that has been improved by making it sound heavier,ballsier, hard driven and louder.
This song is a bit lame, it needs to be Riffed up.
by bassnick September 25, 2006
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