The very rare merging of the commonly known douche and the largest known tool to man.
Signs that someone you know is a douchetool include:
They sporadically engage in random Tourette-like fist pumping.
They claim that they get many women when in fact they do not.
They proceed to change their facebook name to something that is different than their real name.
They are commonly known to flake on you if your not out on the lake because of their weird lake fetish.
Rony "Swisshouse" - Yo Swizzham check out mah facebook name!
Ashik "Swizzham" - Hell ya, let's fist pump to that Swishy Sweezy Swizz baby
n. A douchbag so rare that it borders on the mythical. The douchicorn is able to take on many forms, only appears for a few seconds randomly at meat markets, and is usually wearing sunglasses inside at night and sports douchie hair. After seeing a douchicorn one may question if it was really there or a figment of their imagination.
You: Oh my god I think that's the biggest douche I've ever seen in my life.