It's a floppy purple bird gif otherwise known as a trash dove. People leave it on comments on Facebook to imply that the person making the comment is being ridiculous. They might be virtue signaling or spouting some political correct nonsense. The person who is making the insane liberal comment will simply think that the person is agreeing with them, but it is a symbol to others viewing that a moonbat rant is happening.
Look at this person and their insane regressive left comments. I'm just going to leave a Purple Floppy Bird trash dove gif sticker here to let other normal people know that this person is an idiot.
by LordViper March 4, 2017
Get the Purple floppy birdmug. by RCG210 November 8, 2003
Get the Purple Sticky Punchmug. When during fellatio, after ejaculation, the female (or male) performing the fellatio punches the recipient directly in the testicles. This therefore turns the recipient's testicles purple giving them the look of purple plums.
Dude I was getting head from this smoking hot girl last night...and then she gave me a purple plum knocker. My balls haven't been the same since.
by Funnyudwords April 20, 2013
Get the Purple plum knockermug. 
An event that happened in the town of Denton, Texas, in the year of 1886. All black people from Denton disappeared without a trace.
Friend: "Hey, what happened to black people in Denton, Texas in 1886?"
Me: "The Purple Shed Phenomenon..."
Me: "The Purple Shed Phenomenon..."
by KING EGGO February 11, 2021
Get the The Purple Shed Phenomenonmug. by whiteyg0tgame April 28, 2009
Get the Purple Tanmug. by James_Hamiltxn December 25, 2017
Get the purple dustmug.