sigep College frat with the greatest number of chapter houses (200+) First college frat to charter a chapter in all 50 states Largest frat in the U.S Frat. whose alumni include Dr. Seuss and John Goodman Coll. fraternity with a skull-and-crossbones symbol Largest college fraternity in the U.S., in brief Popular fraternity, familiarly Member of a popular college frat