by HiImRightYourWrong September 26, 2010

by Wriech July 1, 2007

Word commonly used in place of "definetly"...most often heard when in the presence of Julie and Mandie
by Mandie February 18, 2005

by Allison September 24, 2004

short for "definatley"
by Laurie *is hot* April 9, 2005

Short for 'defective', which means 'the Ultimate', superlative, better than good...
This started some time after Michael Jackson's "I'm Bad" video, in which 'bad', of course, meant 'good'.
So, to denote a meaning that means the ultimate superlative of 'good', people started using 'defective', which of course is the ultimate superlative of 'bad', and which then was simply abbreviated to 'def'.
This started some time after Michael Jackson's "I'm Bad" video, in which 'bad', of course, meant 'good'.
So, to denote a meaning that means the ultimate superlative of 'good', people started using 'defective', which of course is the ultimate superlative of 'bad', and which then was simply abbreviated to 'def'.
by reality_bytes August 20, 2007
