backslider
bad egg
bad lot
base
bastard
black sheep
blackguard
caitiff
corrupt
criminal
crook
degenerate
depraved
evil
fallen angel
felon
felonious
flagitious
good-for-nothing
heel
hood
hoodlum
hooligan
infamous
iniquitous
knave
lecher
lost sheep
lost soul
lowlife
malefactor
malefic
malevolent
misbeliever
mischief-maker
mischievous
mug
nefarious
perverse
pervert
pimp
profligate
rapscallion
rascal
rascally
recidivist
recreant
offender
wrongdoer
deviant
deviate
scapegrace
wretch
bloodthirsty
calumniator
conscienceless
cowardly
despot
graceless
knavish
laggard
mean-hearted
miscreants
rogue
varmint
venal
villainous