evacuate bowels

evacuate (one's) bowels

To defecate. Hang on, I've got to evacuate my bowels before we leave the house.
See also: bowel, evacuate

evacuate one's bowels

Euph. to defecate. After taking a jog around the block, Jill felt the need to evacuate her bowels. I am afraid my little boy is sick. He has not evacuated his bowels for several days.
See also: bowel, evacuate