A masturbation technique where you take a jar of Smuckers (your choice of flavor), open it and insert your penis, then proceed to masturbate with the jam.
OPTIONAL: After ejaculating into the jar, make a sandwich or bagel with it and give it to your girlfriend, hated brother, or enjoy it yourself.
Random Guy: I totally made my gf a Smucker Fucker sandwich last night!
Random Guy2: Whoa what did she do to you???
Random Guy: Next time she makes ME the sandwich bitch!