What is Bat Signal?
1.
When a man takes stretches out his scrotum with his hands, then someone puts a flashlight behind it to illuminate the shadow on the wall.
Ray-Ray's wife was greatly suprised, when she arrived home, opened the door to her bedroom, and found her husband sending her the bat signal.
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2.
a stealthy maneuver done to a guy while he is either asleep or passed out. when you take the scrotum-AKA the ballsac and stretch both sides, making the bat signal.
kid1: "have you ever been dooped?"
marines guy: "no...but i did get a bat signal once!"
everyone: "WHAT THE FUCK!?!?!"
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3.
When a physically endowed woman is showcasing her blessed mammory glands with revealing cleavage at a social establishment. BAT is an acronym for big ass titties, but also means that when a chick flashes her badass chichis, Bruce Wayne himself would pay admission.
Damn, son, you saw Dulce tonight? Shes flashing the motherfucking bat signal son! Mm mmm....
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4.
A mass text message or email that informs your friends of an impromptu social event.
Researcher 1: We've been sequencing DNA for 13 hours; I need a ton of beer and a dance party, in that order.
Researcher 2: Hell yeah! I'll put out the bat signal.
