Analagous to the f stops on a camera,this refers to aperture settings built in to the anus.These f stops vary with the load. An f-1 would be used to pass a tapeworm while an f-11 would be needed for a loggerhead turd. Butthole f stops can get out of sync with excessive anal sex which can and often does result in turd whittling.(passing a turd through too small of orifice)
This one ole gal I knew had a gaping bunghole because her butthole f stops were all messed up.
by wolfbait51 June 06, 2011

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×