The feeling you get after sending a friend an extremely unflattering, embarrassing, or accidental snapchat. Usually results in praying for the snapchat to not be able to send, for fear of potential future blackmail opportunities.
-Girl 1: *sends a flash selfie snapchat of herself derping*
-Girl 2: *screen shots, laughs evilly, and posts said picture on every social media they know of*
-Girl 1: "shit.. the Snapchatter's Regret is so real rn"
Unknown friends who talk bullshit, Send memes, make fun of tywan, love each other, and Preach to the Lord these are the best kind of friends yall cant compare to our bullshit