1.)A person or thing that dents objects, usually metal.
2.) When in an argument, the person who disproves the apposing view without any logic, and makes the other person feel like a complete idiot.
Ryan- "So my son Damian got his drivers license today?"
Kieth-"Oh, so you have another denter in the family then huh?"
Paul-"Oh what a denter he is!! He got you bad!! How dumb do you feel?"
Zara-"Pretty Dumb, Paul! Pretty dumb."