A Phrase used when someone says something really odd, out of place, stupid, and/or perverted. Usually accompanied by throwing a flag or some other object (napkin, paper, shirt, etc...)
Group of friends, Ray Marcus and Pat chillin
Ray: "Man, I finally got the pussy last night"
Pat: "That's wassup man"
Marcus: "I'm mad at you Ray, last night we were supposed to spend time together"
Ray & Pat "WHOA!!! FLAG ON THE PLAY!!!"
by bliggablaggah February 1, 2011
Get the Flag On The Play mug.
When something goes wrong at a party, usually when someone knocks into you and makes you spill your beer. Comes from watching football and the ref throws up his flag in reference to a penalty. Also see party foul
**Ben falls into Ryan knocking over his beer**

Ryan: WTF, Flag on the play dude
by BinRock January 27, 2006
Get the flag on the play mug.
When one straight person makes a questionable homosexual comment or gesture to another straight person. Just like in football when a flag is thrown indicating a penalty.
Peter: What was up with Bjorn grabbing your junk earlier tonight?

John: Yea, that was a total rainbow flag on the play.
by vAnCiTyCaNaDa March 24, 2009
Get the Rainbow flag on the play mug.