Top Definition
1. A portmanteau of criminal and nail. Generally a nail that has some sort of fungal infection, which is widely accepted as bad for a nail, therefore it is a criminal, which should be treated with curanail.

2. A general insult based on this.
1. That nail is a criminail, why not use curanail?

2. Shut up, you criminail.
by thegweerenator November 26, 2009
4 Words related to criminail

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