Synonyms of go back on

verbTo be treacherous or faithless to; to betray.

• double-crossTo betray or go back on; to deceive someone after having gained their trust and led them to believe that they were...
• sell outTo betray (a person), usually a close friend or family member, for personal gain.
• stab in the backTo betray (somebody).
• assfuck Canada, USTo betray.
• betray
• burn slangTo betray; to con or rob.
• cop out slangTo abandon, let down or betray (someone).
• cross out slangTo lie to or betray (someone); to deceive or scam (someone).
• cross up Canada, USTo double-cross or betray (someone).
• do someone dirtyTo deliberately treat someone in an unfair or harmful manner.
• do the dirty on Australia, UKTo treat (someone) in an unfair manner; to cheat or betray.
• knifeTo betray, especially in the context of a political slate.
• let downTo disappoint; to betray or fail somebody.
• play someone falseTo betray someone; to be disloyal to someone.
• sellTo betray for money or other things.
• sell the pass IrelandTo betray one's comrades or countrymen; to betray a cause.
• sell down the riverTo betray, especially in a manner which causes serious difficulty for the one betrayed.
• sell downTo betray a person; to conspire against someone for personal gain.
• traitorizeTo be a traitor to; betray.
• turncoatTo act as a turncoat; to betray.
• false obsoleteTo violate, to betray (a promise, an agreement, one’s faith, etc.).
• quisle rareTo collaborate with an (occupying) enemy power; be a quisling.
• renegade datedTo desert one's cause, or change one's loyalties; to commit betrayal.
• swike dialectal, obsoleteTo deceive, cheat; betray.