A wannabe punk ass who isn't bad enough to be punk, or a fake punk who is just trying to get ass from a real punk, or just someone who likes the clothes but doesn't have the attitude.
Kelly is so diet punk, she told me today that she likes tan, blonde boys who play football.
by Shauna.o August 13, 2007
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A genre of music that is a fusion of mainstream or pop and punk rock music. The bands often look and dress punk, but the music is created to appeal to the mainstream. Often created for maximum image and radio play.
Bands like Green Day started the Diet-Punk movement, which opened the door for Good Charlotte and the like.

You can't buy punk at the mall, that is Diet-Punk my friends.
by Mr. Twister March 29, 2007
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