1) Back nuisance 2) British prostitute 3) Hitter 4) One who smacks 5) Openhanded smiter 6) Spanker 7) Striker 1) Spanker 
• (n.) Anything monstrous; a whopper. • (a.) Alt. of Slapping • (n.) One who, or that which, slaps.
Slap'per noun 1. One who, or that which, slaps. 2. Anything monstrous; a whopper. [ Slang] Grose. 
Slapper is British slang for a sexually easy woman, or tart; a prstitute, slut.
[n] - a hitter who slaps (usually another person) with an open hand
spanker noun a hitter who slaps (usually another person) with an open hand; `someone slapped me on the back and I turned to see who the slapper was`; `my father was the designated spanker in our family`
A slapper is a female who is a bit loose. A bit like a slag or a tart. Probably also translates into tramp in American.