Bromenclature of the Day

Bro-Magnon - noun
One of the main types of early bros, dating from roughly 1950 - 1970. Known for their varsity sweaters, adoration of the Kingston Trio, and tendency to date women with two first names (e.g. Peggy-Sue or Louise-May).
ex: There were a lot of Bro-Magnons at Princeton when Scott's father went there.