tapper
nounUK /ˈtæp.ər/
US /ˈtæp.ɚ/
A person who taps something lightly.
The tapper on the door was my little sister.
OTHER MEANINGS
2. A device or tool used for tapping, such as a tap dancer's shoe.
She wore special tappers that made a clicking sound.
3. A person who draws beer from a tap.
The tapper at the pub poured us fresh drinks.
4. A person who taps rubber trees to collect sap.
The tapper worked early in the morning in the rubber plantation.