May 10 Share definition Flag May 10th is the day where you'll tell whoever you want whatever you've needed to tell them in the longest. "Dude it's May 10th you know what that means ;)""No I'm not gonna tell him I like him =/" May 10 by thatoneextremlygoofylimelight♡ April 19, 2020 0 0 Get merch Get the May 10 mug. Buy Now — $32.95 See more merch