The combination of slobbing on a nob and humming one's favorite tune.
"I hum far too much johnson for my own good."
"I have an idea, how about you hum a johnson!"
"I'm gonna go tame that ass."
"I hooked up with a bitch last night."
"Did she hum your johnson?"
"Naw she gave me that gum job
cus she had no teef."