Sriracha moustache Share definition Flag The result of sex with a menstruating woman, then wiping your penis on her face. "Dude, your sister's a freak. She asked me to give her a sriracha moustache. I had to look it up. I mean, I did it, but still..." Sriracha moustache by Dharma Midget March 8, 2017 Get the Sriracha moustache mug.