hunk of rock

A diamond, especially in 1930s slang.

Look at that hunk of rock on May's finger! She must be marrying a hustler

hunk rock

A contraction of "humorous punk rock," a musical genre comprising punk rock works intended as parodies of the actual punk oeuvre, which originated with Paloma Music's 1978 release of the vinyl 45 recording "Picked Off the Litter" by John Vomit and the Leather Scabs, a band formed by members of the Stanford Chaparral campus humor magazine, featuring the songs "Punk Rock Star" and "I Suck."

Unbelievable, I just scored a mint-condition copy of the original Hunk Rock record, "Picked Off the Litter," on eBay for only a thousand bucks!