Not sure if you're talking about Boomslang from Stars Vipers, since that's the only one I wasn't familiar with either when skimming the past few pages, but it's a cute little (and deadly) green snake. I didn't read the entirity of the UD definition because I got the idea after the first 5 or so words. I don't think it's at all inappropriate because its CLEARLY referencing the snake, not the sexual act, since their gym name is "vipers".
I have to agree with
@cupieqt - anything can be made inappropriate. If you look up "peach", "pink", "wildcat", "C5", "jag", "shooting star", etc, on UD, you'll find another meaning of the word, all inappropriate for youth sports on varying levels. And as long as the team name has an appropriate original meaning, then it's not an issue. I want to assume that most people are mature enough to not think of lady parts when they hear "pink" and "peach".