SYCOPHANT
sycophant, toady, crawler, lackey, ass-kisser
(noun) a person who tries to please someone in order to gain a personal advantage
Source: WordNet® 3.1
Etymology
Noun
sycophant (plural sycophants)
One who uses obsequious compliments to gain self-serving favor or advantage from another; a servile flatterer.
Synonyms: ass-kisser, brown noser, suck up, yes man, Thesaurus:sycophant
One who seeks to gain through the powerful and influential.
Synonyms: parasite, flunky, lackey, Thesaurus:sycophant
(obsolete) An informer; a talebearer.
Verb
sycophant (third-person singular simple present sycophants, present participle sycophanting, simple past and past participle sycophanted)
(transitive) To inform against; hence, to calumniate.
(transitive) To play the sycophant toward; to flatter obsequiously.
Source: Wiktionary
Syc"o*phant, n. Etym: [L. sycophanta a slanderer, deceiver, parasite,
Gr. sycophante. The reason for the name is not certainly known. See
Phenomenon.]
1. An informer; a talebearer. [Obs.] "Accusing sycophants, of all
men, did best sort to his nature." Sir P. Sidney.
2. A base parasite; a mean or servile flatterer; especially, a
flatterer of princes and great men.
A sycophant will everything admire: Each verse, each sentence, sets
his soul on fire. Dryden.
Syc"o*phant, v. t. Etym: [CF. L. sycophantari to deceive, to trick,
Gr.
1. To inform against; hence, to calumniate. [Obs.]
Sycophanting and misnaming the work of his adversary. Milton.
2. To play the sycophant toward; to flatter obsequiously.
Syc"o*phant, v. i.
Definition: To play the sycophant.
Source: Webster’s Unabridged Dictionary 1913 Edition