uncomplimentary
abusive
back-biting
belittling
bitchy
calumniatory
calumnious
catty
censorious
contemptuous
contumelious
defamatory
denigratory
deprecatory
depreciative
depreciatory
derisive
derisory
derogatory
detracting
detractive
detractory
disparaging
libelous
minimizing
pejorative
ridiculing
scandalous
scurrile
scurrilous
slanderous
slighting
vilifying