Thersites
backbiter
belittler
calumniator
caustic critic
cynic
debunker
decrier
defamer
deflater
depreciator
derogator
detractor
disparager
hatchet man
knocker
libeler
muckraker
mudslinger
railer
social critic
traducer
adulterer
betrayer
blasphemer
blockhead
boaster
braggart
caitiff
cheaters
deceiver
dissembler
flatterer
fornicator
forswear
impostor
liar
poltroon
seducer
shirkers
sneak
suborner
swindler
sycophant
weakling