Why called "Choppers" ?

[Fudd7405]

My chapter in New Orleans had a dog named Chopper. ; ()

[EX1127]

Here at Mississippi State we have jerseys with choppers across the front for intramural

[justincase22]

The term came from Lambda Chi or shortened to Lamb Chops as a demeaning term used by other organizations. I cannot say for sure when the term was turned around to just Choppers which has a bigger apeal to it meaning tougher, and stronger.
One other that I heard was Lamby Pi way back when.