Shimming

[Julene]

a small object or piece of material used between two parts of something to make them fit together, or to prevent them rubbing against each other:

[Cami]

to put a shim (= a small object or piece of material) between two parts of something to make them fit together, or to prevent them rubbing against each other:

[Vania]

To [abstain] from the use of [drugs] or [alcohol].

[Kai]

[using] your [fingers] to make a woman [feel] tighter