(noun) a subdued thrumming in the head that is more unsettling than uncomfortable, and does not
hurt so much as just feels strange, not at the level of a
headache, something lighter, usually induced by substance
abuse or an almost-hangover therefrom, but potentially resulting from anything, or nothing, for all you know.
Jake attributed his headswim the next
morning to the
brand of the whiskey rather than the amount.
"Are you hungover?"
"No, just kind of a headswim. I need an UpTime."