The opposite of exaggerate. To grossly understate something.
Chris. Hey Peter I picked up last night.
Peter. Awesome, Chris, was he hot?
Chris. For the last I’m not gay!
Peter. Ok Chris. Was “she” hot?
Chris. Eer, she was pretty….er average.
Bobby (who saw said girl). AVERAGE! Don’t inxaggerate! I’ve fucked better looking manatees.
Peter. You had sex with a manatee, Bobby. Was he hot?