is a specific kind of: shirker, slacker.

derivation: affect, dissemble, feign, pretend, sham | assume, feign, sham, simulate | malinger, skulk.

is a specific kind of: beguiler, cheat, cheater, deceiver, slicker, trickster.

is a broader term that covers: name dropper | ringer.

derivation: affect, dissemble, feign, pretend, sham | bull, bullshit, fake, talk through one's hat | counterfeit, fake, forge | act, dissemble, pretend | assume, feign, sham, simulate | cook, fake, falsify, fudge, manipulate, misrepresent, wangle | assumed, false, fictitious, fictive, pretended, put on, sham | bastard, bogus, fake, phoney, phony.