look up any word, like 12:
 
1.
Fist you hold up at a rock concert composed of holding out you index finger and little finger while holding down the other two with your thumb.
Wow! look at everybody's rock fist this concert is gunna kick ass!
by Ross K. September 06, 2007
 
2.
the act of a man plundering an anus of another while the penis is not erect.
when john couldn't get aroused, he rockfisted into his boyfriends anus while not erect.
by Johnny Edwards IV February 17, 2007