1. Someone with either a lazy eye or one normal eye and one glass eye, usually the fake/lazy eye flops and is easy to notice.
2. 'Jessy' can also be used as an insult.
Person 1: 'Wow look over there!'
Person 2: 'I can't seeanything, what is it?'
Person 1: 'Your a fucking jessy!'
Person 2: 'Fuck you'
A younger/teenage girl who deliberately comes between a guy she likes & his girlfriend, by pretending to just be a friend then getting him to spend all his time with her, till the girlfriend dumps him. Leaving it clear for her to make a move. - "Pulling a jessy."
Kelly - "What's going on with you & James?"
Melanie - "He's seeing someone right now, but I'm going to pull a jessy."
Jake - "Did you hear about Steve dumping his girlfriend?"
Dan - "Apparently he's seeing some Jessy instead now."