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1.
Verb
To shag a girl
The act of shagging a girl
Said as what a boy does to a girl with his penis to her punani
Past tense - knobbed
Male: "I'd give her a good knobbing"
Female: "The knobbing he gave sent shivers up my spine"

"I knobbed her good"
by bridgenie August 20, 2005
 
2.
The act of sucking a penis.
Man did you see Sue knobbing the new boss.
by Captain Spanky July 21, 2006
 
3.
The act of placing a door knob in ones vagina/ass

Also referred to as Christopher Knobbin
Steve: Hey Frank have you seen Jess today?
Frank: Yeah shes at home knobbing right now.
Steve: Oh niiice!
by Franky Fresh March 01, 2008