Douche Wanderer

A Douche wanderer, or conversely stated, a wandering douche, is a specific type of d-bag that interjects to make a snide douchy comment that's most likely malicious, and, most importantly, this douche is often a complete stranger or not engrossed in the conversation.

I was skating yesterday and not landing many tricks when a douche wanderer approached me and remarked "nice moves" then walked away snidely laughing aloud.