Something you insert into woman's vagina along with your cock due to your lack of size and or her lack of elasticity.
Bones: Hey Fav, I heard you gave it to old Sally Hayes last night.
Fav: I tried. You know what they say about Sally !
Bones: No doubt ! What did you use for a love shim ?
Fav: A can of Pabst Blue Ribbon !
Bones: Man, you are old school !
Fav: Yeat !