1. To throw up really bad multiple times for a longer period.
2. Blow to the stomach that sends the victim flying.
3. To hit the stomach area hard enough to let the victim puke.
"what's wrong Charlie?"
"man I had Stomach Hadouken all night"
"you shouldn't have drunken all those beers last night then"
"what are you? a smart ass? Stomach Hadouken!
"why Charlie?!*lands 3 feet further then pukes*"