A Belgian or more likely Dutch cycling fan who, after three solid days of drinking at the top of a mountain pass, has devolved from a Schlug. Schmenges are differentiated from Schlugs in that they are abusive to cyclists.

Popularized by Bob Roll during Tour de France coverage
The schlugs having transmogrified into schmenges at the Schmengefest - catcalled to the Tour de France cyclists.
by Jim H July 14, 2004
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