Gerp

A fool, someone who doesn't listen to sound advice or reason.

Example: Ignoring good advice because you think you know better when in actuality you don't.

Sentence: You should've studied for the test like I told you to, instead you played the game all night like a gerp.

Gerp

A fool, someone that doesn't listen to good advice.

Example: You could've passed the test if you would have listened to me and studied, instead you stayed up all night playing the game like a Gerp.