a stab in the back
• a treacherous act or statement.
• "this public disavowal was interpreted as a stab in the back that could not pass unavenged"
stab someone in the back
• betray someone.
• "it was very competitive, with everyone stabbing everyone else in the back"
Similar:
betray,
be disloyal to,
be unfaithful to,
desert,
break one's promise to,
double-cross,
break faith with,
sell out,
play false,
inform on/against,
tell on,
sell down the river,
blow the whistle on,
squeal on,
peach on,
grass on,
shop,
stitch up,
do the dirty on,
rat out,
finger,
drop a/the dime on,
pimp on,
pool,
put someone's pot on,
