1) The act of proceeding to ejaculate on tiramisu, after eating a slice of bulgarian feta cheese.
2) The feeling of delight and happiness you get when Manchester United player, Dimitar Berbatov, does the things he's paid for. (I.E. Scoring a goal, anything)
(For definition 1)
Girl 1: My boyfriend gave me a cake for my birthday!
Girl 2: Oh really? What kind?
Girl 1: A bulgarian delight!
(For definition 2)
Guy: I had bulgarian delight, when berbatov actually did something during the match yesterday.