sycophant

n. one who attempts to gain favor by flattering others

"Toady" redirects here. See also, Todi.A sycophant (Gr. συκοφάντης) is a servile person who, acting in their own self interest, attempts to win favor by flattering one or more influential people, with an undertone that this is at the cost of their own personal pride, principles, and peer respect. The Anglo-Saxon equivalent is toady, or perhaps hanger-on.
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Noun
1. a person who tries to please someone in order to gain a personal advantage
(synonym) toady, crawler, lackey
(hypernym) flatterer, adulator
(hyponym) apple polisher, bootlicker, fawner, groveller, groveler, truckler, ass-kisser

n. sycophant

(v. t.)
To play the sycophant toward; to flatter obsequiously.
  

(v. t.)
To inform against; hence, to calumniate.
  

(v. i.)
To play the sycophant.
  

(n.)
An informer; a talebearer.
  

(n.)
A base parasite; a mean or servile flatterer; especially, a flatterer of princes and great men.