seaweed(s)

a person, or group of people, that doesn't do anything, they just stand and stare/judge at people, normally have a small attention span and low IQ, their body language resembles seaweed, swaying and not doing anything

Person 1: "Ugh, do you see all those people staring at us? It makes me so uncomfortable, all they do is judge"

Person 2: "Just ignore them, they are a bunch of seaweed(s) that won't go anywhere in life."