any person or persons such as a parent, grandparent, religious group, etc. that prevents one from listening to or participating in rock music in any of its forms.
Dude: That song on the radio is pretty good. Who sings it?

Lame: That song is by Alice in Chains. Don't they worship Satan? Why don't you listen to some gospel music?
turns off radio

Dude:What a rock blocker...
por mr.benzedrine 03 de Julho de 2009

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