Slăp'per1, n.
n. 1. One who, or that which, slaps. 2. A person or thing of great size; a whopper. [Colloq. or Prov.] Grose.
2 entries under this word
Slapper
Slăp'per or Slăp'ping2, a.
a. Very large; big; great; of great size. [Vulgar.]