The "Bro Switch" is the figurative switch that one would "flip on" so that they don't find their friend's partner sexually attractive.
by MyFinch August 3, 2014
When you've invited a male friend to join you for something and he's unable to go, but says his girlfriend or wife is free & he's already told her & she's really excited & where exactly should she meet you?
I had two tickets to the baseball game. I invited Mork, but he pulled a classic bro-&-switch, so I ended up explaining the meaning of the word "bunt" to Mindy.
by Brendon Katz-Smith September 24, 2010