An obsequious person that tries to win the favor of someone, usually their superior(noun)
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Use "kiss-ass" in a sentence
"She's herself instead of being a kiss-ass like Betty."
"I'm not being a pony-tailed kiss-ass S.N.A.G.* here, I'm just telling the truth."
"The only thing that was interesting about that video was realizing that ET Canada is much better than the bo-toxed celebrity kiss-ass version we have here in the states."