A phrase from a Indian guy on facebook who wants to try to hit it with a girl, but thanks to his small knowledge of English, it has improper grammar with some words misspelled. This mostly has become a meme due to it's hilarious misspelling and improper grammar.
vagenda: (origin, Fringe, Walterism) from - vagina agenda
(n.) the act of fooling a man into thinking you're his girlfriend, while his real girlfriend is trapped in another universe, by using your vagina, so you can steal valuable information and ancient pieces of technology.
A series of tasks a woman carries out with her vagina in order to ensure the success of her plans. Also used by the fabulous Walter Bishop in FRINGE when he and his son discovered his son was sleeping with the alternate universe version of his love.
"It's all because of that temptress! She tricked my son with her carnal manipulations and he fell RIGHT into her vagenda." - Walter Bishop from FRINGE