Top Definition
To upchuck a small amount of cum, into your beard, immediately after swallowing a load.
I had way too much mac n' cheese for dinner, so when I was having anonymous sex in the park afterward I got all gaggy and Jizzy Jasoned.

Hey, if I Jizzy Jason on the first date, do you think it's over?

I wonder if that Jizzy Jason I pulled last night has anything to do with my recent acid reflux.
by Sleeping on November 21, 2007
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