run around
stiff
thimblerig
creep
wanderlust
pistanthrophobia
cheatlike
skank
geck
double deal
jockey
chate
lirt
roving eye
chisel
cheater, cheater, pumpkin eater
cheaty
cheat
fidelity
screw over
cuck
rort
bird dog
trucky
nuncle
play up
cheatingly
seven-year itch
rump
involved
fiddler
cheat on
polygamy
cozen
fainaigue
lock down
cheaters never prosper
blench
rook
stead
screw
do
jink
lover
becheat
gyp
betrump
baby
gull
bull
cog
sell
cheater
manfriend
bandit
confidence trick
threap
gaff
outcheat
trichery
slur
cuckquean
woo
adulterous
flimflam
cheating
attached
two-timing
significant other
cuckold
bilker
finagling
adulterer
intake
flame
unfaithful
condonation
two-timer
antirelationship
crush
squeeze
bait and switch
syndyastic
adulterine
the fucking you get isn't worth the fucking you get
aroness
aromanticism
fixer-upper
fool around
assignation
begunk
micro-cheat
sell someone a bill of goods
tryst
mountebank
sensuality
co-dependent