When a girl is going all out. When a girl needs support from her female friends to keep going. Like the common male saying, going "balls out"
It is raining and windy and we are deciding to go for that hike or stay in, "titty's out" and we go out and hike.
by Magilicious October 26, 2010
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When a convertible car has its top down.

If a girl is "topless" her titties are out so you can use the same phrase to describe a car.
Guy 1: Aye, man, you wanna take a ride in my whip?

Guy 2: Yeah, but let's ride with the titties out.
by Urban Don March 14, 2015
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A day of unseasonably warm weather following a lengthy stretch of cold weather that causes women to overcompensate by wearing unusually revealing or form-fitting clothing, thus accentuating their breasts and allowing men to see them for the first time in weeks or months.
The first warm day of spring at my college campus was the biggest Titties Is Out Day of the year.
by DCDLM February 08, 2007
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