To Deck, To get decked; to hit or be hit viciously hard without mercy, usually in the mouth or nose region. To strike down upon another human with great vengeance and FURIOUS anger.
When your having sex with two or more women on the roof of a home missionary style. However, before you cum you flip the women over and jizz on there backs instead. This way the skeet will fill the scratches left behind by the shingles, and possibly prevent infection.
"Hey yo Jake, those two girls that i shingle decked last night ended up in the hospital because there backs burnt too much..."