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Webster 1913 Edition

Noun.

One who strives to put another under obligation; an officious person; hence, a flatterer. Used also adjectively.

Smiling

pickthanks

, and base newsmongers.

Shakespeare

Noun.

An officious fellow who does what he is not desired to do, for the sake of gaining favor; a whispering parasite.

pickthank ‎(plural pickthanks)

sycophant