uncomplimentary
abusive
back-biting
belittlement
bitchy
calumniatory
calumnious
catty
censorious
comedown
contempt
contemptuous
contumelious
decrial
defamatory
deprecatory
depreciation
depreciative
depreciatory
derisive
derisory
derogation
derogative
derogatory
detraction
detractory
disapproval
discrediting
disgrace
disparagement
disparaging
faint praise
indignity
knocking
libelous
lukewarm support
minification
minimization
minimizing
pejorative
putting down
qualification
ridiculing
scandalous
scurrile
scurrilous
slanderous
slighting
sour grapes
vilifying
dispraise
whitling
whittling