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1.
An intestinal obstruction, usually in goats or cattle, but sometimes in humans. A trichobezoar is a ball of hair, and a phytobezoar forms around an undigestible object, like rocks or chewing gum.
"The autopsy revealed the presence of a trichobezoar in the girl's intestine... she had been eating her long fringe."
by Bennett Foddy September 21, 2003
 
2.
an obstruction or annoyance of justice
be a bezoar and be gone
by beenson August 23, 2003
 
3.
harry potter slang for a bitch wizard
"BEZOAR please, you don't wanna start any qudditch with me!!!!"
by Angela Harris July 11, 2008