The female equivalent of morning wood. When a woman wakes up horny and with an erect clitoris.
Friend 1: The GF woke me up today by straddling my face.

Friend 2: She must have had a bad case of morning marble
by alfalfa31 December 12, 2015
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The female analog to morning wood. When a woman wakes up horny and with an erect clitoris. Usually results in the morning rape of her significant other, or some random passer-by.
Woke up with morning marble today... surprised the shit out of the mailman.
by alfalfa31 November 22, 2015
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