1. Pet name for your girlfriends, who are the sexiest, coolest, most fun group of bitches on the planet.
2. Word used to describe sexy women.
Guy: "We were supposed to hang last night, where were you?"
Girl: "Sorry Sugar, I had better things to do. I was out with my Smoochie Muffins."
Guy 1: "Damn dude, did you see Rachel, Kelly and Angela tonight?"
Guy 2: "Yeah, they are definitely the hottest Smoochie Muffins here."