Answer: sigep

AnswerCrossword Clue
SIGEP

Largest college fraternity in the U.S., in brief

SIGEP

Coll. fraternity with a skull-and-crossbones symbol

SIGEP

Member of a popular college frat

SIGEP
Popular fraternity, familiarly
SIGEP
College frat with the greatest number of chapter houses (200+)
SIGEPFirst college frat to charter a chapter in all 50 states
SIGEPLargest frat in the U.S.