boswhip Share definition Flag The act of throwing a colleague or co-worker under the bus so badly that you look like an absolute fool for letting a project fail that was never your fault to begin with. He "Boswhipped" you so badly I can see where you are bleeding from your back side. boswhip by jreyna December 12, 2007 0 0 Get merch Get the boswhip mug. Buy Now — $32.95 See more merch