(compound verb) defecate Expletetive reference by men to defecation. Litterally: to terminate the action of feces extrusion through the anus by contracting the muscular anal aperture. At work Steve said, "I need to take a break, I have to pinch one off." (Also: to "pinch a loaf")
PINCH ONE OFF
Meaning of PINCH ONE OFF in English
Slang English vocab. Английский сленговый словарь. 2012