Top Definition
A type of very happy ejaculation that happens when a girl offers herself in light blue, pink or white lingerie.
"OMG I had such an awesome yayjaculation thanks to her light blue maid out fit!"
"OMG that pink mini-dress is epic! Yay!"
"OMG I think I'm gonna yayjaculate!!"
by Americalex September 23, 2011

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