NFG

Proper noun

 * , an American pop punk band formed in 1997.

Adjective

 * 1)  no fucking good (or, bowdlerized, no freaking good). This mark is written on an object to identify it as unusable, having failed inspection, and so on. Often seen in manufacturing environments and the U.S. military.
 * 2)  no fucks given (it doesn’t matter)
 * 1)  no fucks given (it doesn’t matter)