Bulbisidous Share definition Flag When a chick is PMSing and gets bitchy and jealous of anybody elses fun. The chick repelles friends and might abandon them. Beware if you have a guy BEST friend then watch out!!! Oh My God! bitchy chick has Bulbisidous, AGAIN!!! Every Fucking Month!! Bulbisidous by Tinky Bell April 29, 2008 Get the Bulbisidous mug.