Short for Diphenhydramine (trade name Benadryl), an over-the-counter antihistamine and sedative. Recreationally used for its deliriant effects, often producing visual and auditory hallucinations indistinguishable from reality. Side effects are consistent with tropane glycoalkaloidal poisoning and death at high overdosage.
Yo man I popped 15 diph's last night and was dreaming while I was awake!
by jeremywn December 20, 2006
Short for Diphenhydramine (trade name Benadryl), an over-the-counter antihistamine and sedative. Recreationally used for its deliriant effects, often producing visual and auditory hallucinations indistinguishable from reality. Side effects are consistent with tropane glycoalkaloidal poisoning and death at high overdosage.
Yo man I popped 20 Diph's last night and I could have sworn my house was on fire.
by jermwn December 23, 2006
a "mentally handicapped" man who causes annoyance to another someone; any word that would come out of a sailor's mouth when he's upset because he lost his treasure/ had to share his treasure with his crew; anyone rude enough that you think you should use this word on them
boys, dicks, assholes, lint lickers, probably you

This boy at school is such a diph! I can't believe how rude he is!
by Shrewsy April 29, 2008

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