I invented this word over a year ago. But to me, it has already existed for quite a long time, even before I was born. The thing existed but the word didn't. Well it just did.
Basically, it's just sweat that forms on your upper lip. Or maybe even on your lower lip. I first thought about this when I was eating atva friend's house. Her sister cooked something spicy and while eating it, sweat formed on my upper and then that was when the term, "water moustache" was born. You're welcome.
S. L
John: *slurps noodles* Man, I can't do this anymore. It's too hot.
Jim: Yeah, maybe you should stop. You're starting to get a water moustache there.
Liquid(s) spawned in or collected in a mustache. A water-logged mustache. Mustache water is believed to have Danish origin - (In Danish: "Overskægsvand")
Mustache water is heavily associated with the Mustache splash, a violent release of Mustache water.
When Aaron came back to bed after brushing his teeth, he gave Rebecca a kiss full of refreshing mustache water.
A trip to a grocery store, convenience store, or gas station for the sole purpose of buying an excessive amount of junk food and sugary drinks, usually with friends. A chud run often happens late at night and ends with everyone involved hating themselves afterwards.