(n.) A fawning, obsequious parasite; a mean sycophant; a flatterer; a toady.

apple-polisher ass-licker backscratcher backslapper bootlick brown-nose brownie clawback courtier creature cringer dupe fawner flatterer flunky footlicker groveler handshaker helot instrument jackal kowtower lackey led captain lickspit lickspittle mealymouth minion peon puppet serf slave spaniel stooge suck sycophant timeserver toad toadeater toady tool truckler tufthunter yes-man