Mamelas Share definition Flag n. A person with a bad attitude; One that constantly complains about life and things they can't change a. Whiny; Annoying; Gay; Mamon; Puto Gabe acts very mamelas when you ask him to do anything. Next time you act like a mamelas, I'm going to slap your eyelid. Mamelas by SDBurro March 27, 2008 Get the Mamelas mug.