A chronic pain beneath the skull brought on by constantlyrefreshing the screen during a Woot-Off, sometimes leading to violent seizures.
Dude - I have a splitting Woot-Off headache. But it was all worth it to score that frank-ass RC helicopter. Just wish I hadn't been flopping on the floor during the Bag-of-Crap.
Used to convey that you have, not just a headache but, a fucking headache by making a circle with the thumb and fingers of one hand then tapping your forehead through it with the index finger of your other hand.
Teen 1: Man, that Lucy Lui is so hot.
Teen 2: (singing to the tune of Stevie Wonders' 'Jungle Fever') You've got Saigon Headache/I've got Saigon Headache/We've got Saigon Headache!
Teen 1: ...okay then