When you are an egg and excited.

Those who have eggs (ova) can be "Eggcited". However, if you don't have eggs, you can't be "eggcited". This term can be used by females at all times. Can be potentially used by males if they use the word "huevos" (which in Spanish means "eggs") to refer to their testes. Men who speak Spanish therefore can also be "eggcited".

something that is so unbelievable exciting that one can barely tolerate it and comes close to exploding.

when a women is ovulating and is enthusiastic about it