A person who has little to say, but takes forever to explain it. Can also be used to describe a person who tells a story that seems to go on forever even though is has very littlesubstance.
dude 1: Man I just saw scott and he told me the story about his trip to jamacia, he went on forever about it.
A person that is particularly longwinded when answering, talking, questioning, referring and generally any other type on verbal interaction. It is a More common trait in annoying young females that are naturally oblivious to other people's disinterest in their conversation.
Can also be applied as a verb for people that are naturally slow in completing simple mundane activites.
I.e. "Where's bec?" "Oh she'll be ages, she's longwinding the shit out of her." "sigh... Fucking Longwind!"