Top Definition
Deriving from the french word 'cul de sac', meaning a dead end road of houses usually ending in a T shape. Ful de sac is the occasion by which the male genitalia, to be more precise the scrotal sack or 'sac' becomes folded beneath the bearer's leg. This condition does not become apparent until the sufferer moves or leans forward and feels an excruciating pain from his ful de sac.

The most inexpensive cure for Ful de sac is a simple cabinet reshuffle.

pronounced:- foldy - sack
Ben - Ouch!! *leaning forwards*

Tom - What ever is the matter?

Ben - A touch of FUL DE SAC
by Benjaminnn May 06, 2008
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