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A phrase used to portray the angst resulting from street cocaine use. Can also be used to describe the actual act of insufflating street cocaine. It represents the anxious feeling of having the compulsion to clutch your sheets in bed unable to sleep or relax.
As a verb: Guys, I'm not going to the birthday party; I'm sheet clutching tonight.

As an adjective: Man, that llello last night was gangster sheet clutchy.
by napkinsPH February 15, 2010