Alpha Tau is known to be a shortening of the sorority Alpha Sigma Tau. Alpha Sigma Tau is one of the oldest national sororities in the USA. It was founded in 1899.

Hot, smart, hard ass mothafuckas who have cast iron stomachs and blue and gold rods. We drink everyone under the table (including people from LSU), keep high GPAs, and get the hottest women. All in all, if you're a mean motherfucker with a penchant for brotherhood and fun, be an ATO.

{Ruh Rah Rega}

A national undergraduate college fraternity based upon leadership and character. Alpha Tau Omega builds character, ethics, and responsibility.

ATO consistently does community service events, fund raisers, and holds regional leadership conferences. Alpha Tau Omega is 100% haze free.

New chapters are required to be substance free, and the ATO national headquarters is in Indianapolis.

A TRUE female frat boy. When you see XAT letters it means respect. Will thrown down harder then you, drink more then you, kick you ass in beer pong, or just kick you ass entirely while still being hot. Has an uncanny ability to party harder then anyone the previous night, wake up unphased, and somehow the next day ace a test. If you ever date one hold on to her: because you will have your best friend and girlfriend in one.
Guy 1: Oh man I just meet this awesome girl who killed me in pong. I don't know whether to hit on her or bring her to Guy's Night. Do you know who she is?

Guy 2: Probably a Chi Alpha Tau girl.

A fraternity otherwise known as ATO, in which the members proceed to rape women and also destroy not only the property of their house, but also the property of surrounding houses

A TRUE female frat boy. When you see XAT letters it means respect. Will thrown down harder then you, drink more then you, kick you ass in beer pong, or just kick you ass entirely while still being hot. Has an uncanny ability to party harder then anyone the previous night, wake up unphased, and somehow the next day ace a test. If you ever date one hold on to her: because you will have your best friend and girlfriend in one.

Chi Alpha Tau is a local Sorority at Millersville University. XAT was founded on October 23, 1984. The sorority motto is "Lasting Friendship and Service to Others." The sorority colors are Aqua and Black, with Opal as the Gem. Chi Alpha Tau's mascot is a black cat with aqua eyes.

Chi Alpha Tau is a social service sorority, not a "female frat boy".