A sexual act involving two or more parties; lines of granola or trail mix are lined along the ass crack near the anus, after which, a partner then eats the granola from the ass crack. A chain of this may or may not occur.
We are going to go horse troughing at the party.

Jim and Fred are horse troughers.

Hey, open this granola. I wanna try horsetroughing.

That girl likes to get horse troughed.

Tony tried to horse trough himself.
by Mikomonkeyman January 26, 2019
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