it's inappropriate and frowned on by others
not the done thing
you allow them to win
let them win
you are not punished for something bad
get away with it
you deceive and mislead someone
con someone
you pretend it happens in order to mislead someone
fake
you feel proud of something that you have done
can hold your head up
you win
come out on top
you do anything in order to win
win at all costs
shockingly unacceptable
disgraceful
you follow the rules
play fair