Define Duelling Meaning

An idiot that needs to have a lesson taught to him, preferably the easy way.

The art of sliding a double ended dildo back and forth between two anal cavities using only farts and turds.

female masturbation race.

The act of yourself and an opponent perfectly aligning your penises and urinate as hard as you can, so that the two jets hit eachother. The winner of the duel is whomever lasts the longest, or manages to defeat their opponent by pushing their stream back.

When two men joust for top sartorial spot using their wardrobes as objects to challenge each other

When you and your friends get together and ejaculate on his/her boobs

Aggressive competitiveness and/or one-upmanship between GNU+Linux experts for recognition or superior technological prowess; particularly due to seniority in the field.