run around
play up
lirt
stiff
cheat on
creep
rump
chate
cuck
thimblerig
two-time
jink
becheat
double deal
chisel
inconstant
cybercheating
skank
rort
nuncle
diddle
trucky
unfaithfulness
geck
fool around
blench
jockey
betrump
cheatlike
cheaty
cheater, cheater, pumpkin eater
cheat
chance
wanderlust
jerk around
paramour
mump
cuckold
wander
faithless
betray
bilker
fainaigue
two-timing
clip
outcheat
cog
break wedlock
adulterous
adulterine
cheating
adulterize
something-something
gaff
mug off
mountebank
rook
fidelity
do
gull
cheater
gyp
bandit
slur
double-dealing
sell someone a bill of goods
bilk
condonation
threap
infidelitous
carry on
adulterer
crib sheet
confidence trick
run game on
trichery
flimflam
two-timer
extracurricular
thimblerigger
monogamish
extramarital
yank around
fiddler
adulting
unfaithfully
put horns on