I would wear those outside my pants just for the hell of it.
If you get a pair I will too.
But really there's got to be a better way than that contraption.
I got a better more natural way to fix this issue. Tuck the rest of the shirt in between your ***.
From what I've noticed lot of older business gents like to wear really big shirts, and it gets all puffy in the back, is this something you do? I try to get a really good fitting shirt and not too long to counter this issue.
Also why so self conscience? are you a fatty or are there a lot of hot girls (guys) there?