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6.
(v.) To flail ones penis at a small child; To stick ones penis in a light socket.
Old man Peterson liked the small boy so much that he decided to dickoff in front of him; The retard saw a light socket and decided to dickoff
by midgetsnatcher October 01, 2003
 
1.
The act of two men engaging in one-upmanship-especially as related to impressing a woman or attempting to present self as intellectually superior.
John and Jack got into a dick off at the bar but I don't think Sally was interested in either of them.

by schmeg8 April 26, 2009
 
2.
To waste time in a manner found inappropriate by a superior or leader. Often times this is not the first time that such inefficiencies have taken place; use of this term implies frustration and eagerness to get said task completed.
-Dude, I can't play b-ball today 'cause I've got to finish up this flippin brief.

-Well, maybe if you'd stop dicking off asking for fucking tots all the time, you'd be done by now!!
by Jyash April 21, 2005
 
3.
being or acting like an imbecile.
only a dickoff thinks that rap is music.
by Andrea Johnson January 09, 2005
 
4.
A competition between guys to see who has the biggest dick.
Person 1 : I bet my shlong is far bigger than yours

Person 2 : Theres only 1 way to find out, lets have a dick-off
by Bennycnz March 30, 2010
 
5.
An insult widely used across the hampshire county of england.
A: Do you fancy going out to the movies tonight.

B: Pffft. Dick off love.
by Rach [Dirty Irish] October 04, 2008
 
7.
A "dick-off" is a challenge between men to see who's penis is longer...
Billy: I bet mine is bigger than yours!

Tom: No way man, there is no way yours is bigger than mine.

Billy: Well I guess we will have to have a "dick-off"
by WillyTJr May 08, 2010