Akademik

stab someone in the back
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; informal tell on, sell down the river, squeal on, stitch up, peach on, do the dirty on; Brit. informal grass on, shop; N. Amer. informal rat out, finger, drop a/the dime on; Austral. informal pimp on, pool, put someone's pot on.
stab

* * *

stab someone in the back phrase
to do something bad that is not loyal to someone who trusts you

When I was in trouble, all my friends stabbed me in the back.

Thesaurus: to be cruel or unkind to someonesynonym
Main entry: stab

* * *

betray someone

* * *

stab (someone) in the back — see stab, 2
• • •
Main Entry:back
————————
stab (someone) in the back
: to hurt (someone who trusts you) by not giving help or by doing something morally wrong : to betray (someone)

He's the kind of person who gets you to trust him but then stabs you in the back.

• • •
Main Entry:stab

Useful english dictionary. 2012.