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3.
big or large in length or in size. not sexwise
the line to this movie theater is diesal.

that dude is diesal but hes ugly
 
1.
extremely awesome, cool, great, etc - to describe something positively
"wow, warped tour was wicked diesal!!"
by Anyway Alexx August 11, 2007
 
2.
another word for dope, herion, smack
yo, that paul wall diesal out in camden is the shit.
by Fiend out September 08, 2006