unpleasant
abhorrent
abominable
bad
barfy
base
beastly
below contempt
beneath contempt
brackish
cloying
contemptible
crude
despicable
detestable
disgusting
execrable
fetid
forbidding
foul
fulsome
gross
hateful
heinous
high
icky
ignoble
loathsome
maggoty
malodorous
mawkish
mephitic
miasmal
miasmic
nasty
nauseant
nauseating
nauseous
noisome
noxious
objectionable
obnoxious
obscene
odious
offensive
overripe
poisonous
rancid
rank
repellent
repugnant