(n.) One who assents.

Babbitt Middle American Philistine accepter anal character apple-polisher ass-licker assentator assenter backscratcher backslapper bootlick bootlicker bourgeois brown-nose brownie burgher clawback cog commonality commonalty compulsive character conformer conformist consenter conventionalist courtier covenanter covenantor creature cringer dupe fawner flatterer flunky follower footlicker formalist groveler handshaker helot hoi polloi inferior instrument jackal junior kowtower lackey led captain lickspit lickspittle lightweight lower class lower orders masses mealymouth methodologist middle-class type minion model child organization man parrot pawn pedant peon perfectionist plastic person precisian precisianist puppet second fiddle secondary serf sheep slave spaniel square stooge subaltern subordinate suck sycophant teenybopper third stringer timeserver toad toady tool trimmer truckler tufthunter underling understrapper yea-sayer