Noun. Meaning bad, but not like your parent died bad. More like "damn I failed that test bad", or "damn, she has a boyfriend already" bad.
(1) -After Ben sees a hot girl making out with a jock-

Ben: Dude. I wanted her. This is so deaph.

(2) -After Math Test-

Jimmy: Dude, question number 12 was so deaph. It was next to impossible!
by the beeman January 10, 2008
Get the deaph mug.