Throw you under the bus
Meaning
Blame or sacrifice someone else to save oneself.
Usage
Used when someone betrays a colleague to avoid blame.
Origin & History
Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.
Modern American metaphor about sacrificing someone to avoid negative consequences.
Gained traction in the 1980s corporate press.