The term wookied is meant to be an other word for getting so drunk you can no longer see straight. At this point the person who has been drinking tries to impersonate the crazy noise the wookie makes in the Star Wars movies. This could also be used as an "warning" for other people that are around the drunk person.
Man, I was so wookied last night I dont know how i got home.
Dude, guess what...... I AM WOOKIED!!! (impersonates the sound)