Inflammation and burning of the Anus that occurs after digesting particularly spicy foods such as jalapenos or wasabi.
"Ive got a mean case of hot knot, must have been the wasabi I ate last night."

by T bones bartender October 6, 2006
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The muscular knot incurred during strenuous sex that requires the lover to stop and take a walk around the room.
John was hitting that ass hard until he pulled out due to a hot knot.
by Trappergus June 5, 2021
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