A fork of Rural Dictionary
Dude: Man, I'm not feelin' so hot.
Dude 2: Maybe you have flu manchu?
A facial accoutrement in the same shape as the iconic moustache, but constructed entirely out of Nasal Mucus.
"Man I'm not feeling great" *sneezes*
"Ha look dude you've grown a Flu manchu on your face"
"Oh yeah you're right, haha, I feel like I'm about to die"