What “Hype” means
In Jamaican usage, hype mostly means showing off, acting proud or flashy, or being full of yourself. It works as an adjective ("yuh too hype") and a verb ("she a hype").
Examples
Yuh too hype!
You're too full of yourself!
Look how she a hype inna har new shoes!
Look how she's showing off in her new shoes!
How to use it
Casual slang, usually teasing or critical. It can be playful between friends.
Where usage varies
The general English sense of "hype" (excitement, getting hyped up) is also heard, especially among younger speakers and in music. Usage varies, so read the context.