f'show - You're so sure of your dumb idea that you're not even listen

You're so sure of your dumb idea that you're not even listening to anyone who tries to stop you.

F'show, I'm gonna start a band with my cat and my brother's old guitar.

F'show, I'm gonna drop out of school to become a professional video game streamer.

F'show, I'm gonna fight my math teacher in the hallway.