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невкусный adj. stresses
gen.	bad tasted; insipid; unsavoury; unpalatable; unappetizing; tasteless (Alexander Demidov); nasty; unsavory
austral., slang	would kill a brown dog
Gruzovik, fig.	nasty
Makarov.	wash
obs.	untasting
slang	goonk; lovey-dovey; nothing
uncom.	impalatable
невкусно adv.
Gruzovik	unappetizingly; unpalatably

невкусно: 23 phrases in 5 subjects

American usage, not spelling	1
Australian	1
General	8
Makarov	7
Slang	6