Based on the ability of your mouth to turn fruit into jelly, "jam maker" is slang for mouth.
"Shut your jam maker and watch the movie!"
by Mama Spell November 07, 2011
A woman who loves to make jam, cakes, or pies or just take care of her man.
Bob's wife is a "jam maker", she picks him up when he's drunk and drives him home, staring at him adoringly.
by Lee Sheldon September 06, 2007