You think that it’s vulgar to observe it as such when a behavior is figuratively the same as pissing down one’s pantleg in fear? My, what a delicate flower you are! You must be offended several times a day, or else live an extaordinarily sheltered life.
You know it’s vulgar.
And I’m only offended a few times a day from people like you on this forum.
My real life friends and associates do not use that expression.