I was in a chat and felt the need to do the action depicted in my avatar. I tried several different ways to describe it, and they all seemed silly things to do..
like
*pulls on his collar* what the fuck does that mean?
*pulls on his collar and...* what? What does he do to make it make sense?
Turns out, I don't think you can put this action into words. I found that in the time it would take me to properly put the action into words, I could go on google images, find this image, and post it instead, and it would NOT be misunderstood.
That little mental exercise convinced me to pay some respect to this little action by making it my avatar.