Putting a hot and horny male stud (horse or man) into the pasture so that he can impregnate female horses (ponies).
Horse trainer A: Man, I'm gonna put Seabiscuit out to stud, he just is no good on the track anymore and his dick is almost done workin'.

Horse trainer B: Yeah man, there's nothing left for him. He's gotta be put out to stud.

Guy: I'm going out to stud tonight! Fuck this horse! Let's hit the bars!
by BWWW May 24, 2007
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