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When someone puts their mouth around the end of your wiener and blows so hard it sounds like your butt is trying to scream.
My cousin did an H-Blow at my birthday and I still hear my butt screaming.
She did an H-Blow during my math test and I got a D because I laughed too loud.
He did an H-Blow in the middle of a Zoom meeting and my boss thought I had a seizure.