I don't recognize that as a standard phrase. It has no clear meaning for me.
Are you perhaps thinking of he's a blue-collar worker? Simply put, this means he works in a job where he gets his hands dirty, rather than in an office. Office workers would be white-collar workers.
It is my understanding, having been in the USAF during the Viet Nam War, which is not like being in the USMC, that a "Blue Suiter" is a freely enlisted Marine (not drafted) who chooses to quit Basic Training and return to civilian life by giving up instead of keep trying until he/she gets it right and passes Basic Training to become one of America's best. The ex-Marine is sent home wearing a bab