By using the comment 'Prick yeah' you are insinuating that the person who initially spoke is a prick. The confirmation of this fact is backed up with 'Yeah'. This can also be used as a general insult or dismissal. The term is generally used loosely amongst friendship groups and can become comical to use every time a person starts to speak. Short and snappy delivery, big impact.
A room filled with people chatting and having a good time. Monique said aloud "Girls aloud are real singers with AMAZING voices. I love them"
Walter replies "prick yeah" and the comment is dismissed. Monique looks like an idiot.
prick idiotic stupidity insult twat idiot