literally a large sandwich is a refrence to the sitcom wings and at every event on nantucket they thought they had to get a "big sandwich" from a deli there.
helen says we should celebratebrian's engagement
lowell says I 'll go pick up a Big sandwich.
When two big sweaty men grind against a man who is smaller or/and weaker to either show dominance, friendship, or homosexual love
“I got big man sandwiched by two guys who I was glaring at in the gym because they wanted to show dominance” or “My two male friends big man sandwiched me to show platonic love” or “My two boyfriends showed love to me by big man sandwiching me”