1) Buttery 2) Cloyingly flattering 3) Creepy 4) Fulsome 5) Fulsomely flattering 6) Grovelling 7) Hypocritically earnest 8) Ingratiatingly earnest 9) Insincere 10) Oily 11) Oleaginous 12) Sleazy 13) Smugly ingratiating 14) Sycophantic 15) Too flattering 16) Unctuous 17) Unpleasantly suave 1) Buttery 2) Completely 3) Fulsome 4) Insincere 5) Oily 6) Oleaginous 7) Sycophantic 8) Unctuous 
Smarmy is slang for obsequious, condescendingly flattering.