The name given to a flow of liquefied faeces that escapes a woman's reactum and settles onto a mattress. The burnt pancake is created after partaking in furiously hard and fast anal sex with a long rod, that withdraws at the point of her orgasm. The faecal matter flows out spreads to settle on the mattress resembling a burnt pancake as it dries.
His long rod pummeled her backdoor and just as her body started to shake he withdrew with perfect timing and served up a perfectly formed burntpancake on the mattress