A method of adding an excess amount of words in order to fill in empty space in an essay, to meet length requirements. Usually used by students in the high school and college levels.
Brenden: Oh crap! I spent so much time with Jane that i forgot to finish my thesis! I'll never finish it by tomorrow!
Clark: Dude, chillax. All you gotta do is spam it up.
Either directly refers to a horrible situation involving mass ammounts of spam, or could be used to describe mail from AOL. Could also mean a large quanity of rather annoying instances.