Top Definition
The act of ejaculating into the middle of a set of box fans that causes the cum to swirl in the air in the manner of a tornado.
I was bored and horny last night so I setup the box fans and started a cumnado!
by Tornado Cum August 20, 2013
2 more definitions
When you have sex with a flacid penis and you cum shoots out so fast that your penis flings in every direction like a stationary balloon being deflated.
"My penis is going around and around, it's a CUMNADO!"
by Straightwhiteniggerfag March 10, 2015
When you have sex with a flacid penis and you cum shoots out so fast that your penis flings in every direction like a stationary balloon being deflated.
"My penis is going around and around, it's a CUMNADO!"
by Straightwhiteniggerfag March 10, 2015

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