A person with no balls.
Basically, a p*ssy, but to annoy him,
call him a "poozi".
Fun to say annoying to hear. "Oh, he didn't ask that girl out? What a poozi!"
Can also say:
"Pooooooozzzaaayyyy"
"Pooooozzzz"
"Pooozclot"
"Poozmanz"
Annoying enough? It works, bruh!