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1 definition by addyAPOCALYPSE and dildoDAVE

 
1.
A very definite way of answering a question, stronger than the normal "definitely".
Dave: Will you be my friend Adam? You're so cool, I love you

Adam: Def-in-a-telly not, now get out of my garden shed
by addyAPOCALYPSE and dildoDAVE February 24, 2009