1. Originating from the music video "#SELFIE" by Chainsmokers, "But first, letmetakeaselfie" is a popular saying used mostly on Vine. It is said right before one takes a selfie; usually taken before one is going to do something --probably something important and/or productive.
2. The most annoying saying ever used on social media, especially on Vine.
Humanity has finally hit 100% retardedness. A son was actually made about taking a selfie. A girl is in a bathroom taking selfies and talking about boys and throwing up at any chance she can (probably because she balimic ) but that story is for another day. While her friend wants to get out of the bathroom she says "But first let me take a selfie" making her possibly a worse person than Adolf Hitler himself.