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Webster 1913 Edition

Slapper

Slap′per

,

Noun.

1.

One who, or that which, slaps.

2.

Anything monstrous; a whopper.

[Slang]

Grose.

Webster 1828 Edition

Slapper

SLAP'PER

, SLAPPING,

Adj.

Very large. [Vulgar.]