Throw Under The Bus Meaning

Example : 1993, Steven Cronin, "Sitter: Girl ‘Asked For It,’ Woman Told Her," Press of Atlantic City, 27 Jan:  "A person who does things for me and befriended me and helped me out when I needed help, I'm certainly not going to throw them under the bus," she said.2008, Brian Grow et al., "Dangerous Fakes," Business Week, 2 Oct., (retrieved 24 Mar. 2009):  "I got thrown under the bus by BAE," she says. "They did not want to take responsibility, so they pointed at us."May 24, 2013' - Schlock Mercenary:  Captain Tagon: So, all you did was serve us fast, before [chef] Ch'votlq could deploy his whisk of ruin?Liz: Please don't make me throw my new boss under the bus.2008, Ken Newton, "Local tiff is the new old thing," St. Joseph News-Press (US), 20 Jul. (retrieved 24 Mar. 2009):  A recent magazine article discussed the need to throw under the bus worn-out cultural catchphrases, with the first being “throw under the bus.”