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Webster 1913 Edition
Bushwhacker
Bush′whackˊer
,Noun.
1.
One accustomed to beat about, or travel through, bushes.
[U.S.]
They were gallant
bushwhackers
, and hunters of raccoons by moonlight. W. Irving.
2.
A guerrilla; a marauding assassin; one who pretends to be a peaceful citizen, but secretly harasses a hostile force or its sympathizers.
[U.S.]
Farrow.