Masher (noun)

1. A person who makes a sexual advance to someone without their consent or interest.
2. A person who makes unwanted sexual advances to someone.

Origin:

From mash (verb) + -er (suffix).

Examples:

1. The masher made inappropriate comments to the woman on the street.
2. The masher's behavior made the woman feel uncomfortable.
3. The masher was known for hitting on women at the bar.
4. The masher's advances were not welcome.
5. The masher's behavior was considered harassment.