ill,
unwell, poorly (UK, informal), off-color, below par, bad, under the weather,
ailing (dated), out of sorts, pale
antonym: well
tasteless,
in bad taste, gruesome, bizarre, sickening, revolting, vile, nauseating
nauseous,
queasy, bilious, green around the gills (informal), dizzy
fed
up (informal), bored, up to here, had it, sick and tired, sick to the
back teeth, sick to death
vomit,
bile (literary), puke (slang), vomitus (technical), barf
(informal)