Throwing Him Under The Bus
A story you use at work to blame someone else as to take suspicion away from you so you don't get the blame.
Dan knew he wasn't WCP compliant, but then either was Scott. So Dan made sure that upper management knew that Scott was non-compliant, thereby taking the heat off him. Dan is good at throwing him under the bus!
throw him under the bus
A special case of "throw under the bus" when a man disdains another man as sexist in order to curry favor with or get in the pants of a woman.
Jerry's botched pick-up line was the perfect opportunity for Barry to throw him under the bus and ask Sarah to rumble on the dance floor.