A fork of Rural Dictionary
When people take selfies of themselves on Sunday. Selfie Sunday was made to have a purpose of selfies on a particular day which in this case is Sunday.
Girl- "Why are you taking a selfie?"
Other girl- cause it's selfie Sunday!
A picture taken of yourself by yourself and posted on a social media site on any particular Sunday.
"Do not photobomb me, this going up as my selfie sunday."