Definitions

1. noun

A person who overuses or overapplies something, especially soap or shampoo, resulting in excessive foam or lather.

“She became notorious as an overlather in the shower, wasting an entire bottle of shampoo in one use.”

2. verb

To use or apply something excessively, especially soap or shampoo, resulting in an excessive amount of foam or lather.

“He overlathered the car with wax, leaving a thick, sticky residue on the paint.”