Top Definition
1) A sexual term used to describe the nut sack being completely contained inside ones mouth creating an airtaight seal. (And great pleasure)

2) A defensive, derogatory, and somewhat threatening response used to impress your guy friends when your woman is not around and you want to talk shit to her.
During an awesome blowjob last night, my girl sucked up both of my balls at once and gave me a sack sandwich.

"Hey Chris...I heard your girl is pissed off because you went to the club last night without her. She said she was going to break up with you."

"Man fuck her. When I get home tonight I am going to serve her up a sack sandwich. Then we'll see what's up!"
by Mr. North April 18, 2009

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