The process of turning a word into a noun. Technically, the process is different than gerunds because the results are slang, not real words. It's also possible to noun things that are already nouns.
See also verbing
"how about some smokeage, buuhdy?"
-nouning a verb "coolness"
-nouning an adjective
The act of repeatedly kicking yourself in the head for letting a witty, charismatic, caring Irish girl walk out of your life, particularly if they wear a claddagh ring and make you feel on top of the world.