Shimming - a new word!

shim

[shim] noun, verb, shimmed,shim⋅ming.

–noun

1.	a thin slip or wedge of metal, wood, etc., for driving into crevices, as between machine parts to compensate for wear, or beneath bedplates, large stones, etc., to level them.

–verb (used with object)

2.	to fill out or bring to a level by inserting a shim or shims.

Origin:
1715–25; orig. uncert.

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.