You won't do it dude is a phrase used by individuals who choose not to engage in normal conversation with others. A conversation tactic developed to challenge the will power of dudes. Each word in this phrase can be stretched to increase or simply change the meaning.
For instance you won't do it dude can be said as:
"You won't dooooooooooo it dude" - could be translated as a question or a moderate challenge / proposal.
3👍 4👎