Arbitrary (and usually incorrect) units of measurement used mostly by males. Derives from men overestimating their penis size. Dick inches are much shorter than actual inches. Hence a guy can claim to have a 9 inch penis when it is actually closer to 5-6 inches. The term "dick inches" is usually used when over-estimating non-penis measurements.
fellow one: "Finally! There's a parking spot!"
fellow two: "No way, man...You can't park within 30 feet of a stop sign."
fellow one: "There's plenty of room."
fellow two: "Yeah, only if you're measuring in dick inches."
by Char H April 19, 2007
a dick inch is alot smaller than a usual inch. inches are 2.5cm, whereas a dick inch is maybe 1cm or 1.5
Ian: I measured my dick today, it's 9 inches
Jack: Sure, you mean 9 dick inches
by jackisthebestateverything December 05, 2009
A unit of measurement commonly used by men when measuring the lenght of their manhood. Usually, 1 dickinch is equal to approximately .25 in or approximately 1cm. Thus, a dickinch is an exagarated unit of measurement used to make items sound larger than they truly are.
Shorty, is only 2 inches long, however, he claims to be 8 inches long, obviously, he is measuring by the dickinch.
by JB Trevor May 27, 2010

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