yellup originally from 'hellup' short for 'shut the hell up'
idealy used when someone is saying something that you dont agree with and you cut them off.
Hellup is used out of anger whereas yellup is more commonly used at any arrangement.
To imply emphasis extend the word i.e. yeeellluuuuuuup!
Isa: No one is allowed to come over the house to drink or play beer pong....
Everyone: YELLLLLLLLLLLLUUUUUUUUUUUUUUUP!
Myko: Let's Go to Mike's Dogs for din...
Jesse: HELLLUP!
Myko: I'm Gay!
Everyone: YEEEEEEEEUUUUUUUUUUP!
Cory: Who dented my truck?
Jesse: Yelllllllllllluuuuuuuuuuup!
verb: To put something out of it's misery. As in the ending of the Disney film Old Yeller, where the young boy puts a bullet between the eyes of his beloved pooch who's gone rabid or old or something.
This girl I hooked up with the other night thinks we're in love or something, I'm gonna hafta old yeller her.