If a person is fully obsessed with Ashlee Simpson.
An Ashlee Simpson obsession.
To love Ashlee Simpson more than anything else in the world.
Holy shit, you are so Ashleed!
That Ashleed kid broke into Ashlee Simpson's house and stole her underwear!
Synonymous with n00b, Ashleed is a term used to describe somebody who excessivley spams forums.
"Wow, there are a lot of new posts on the forum"
"Don't mind them, it was an Ashleed