a dirty date is when you work hard all day to get a certain project done no matter whatthe weatherconditions are are any obstacles in your way you will overcome them
A holiday that is on March 28th every year. During "Spank Me I'm Dirty Day" most people tend to get muddy and wraunchy, and spank each others asses repetitively.
Guy 1: Oh my days that girls a slag look at her!
Guy 2: I think she’s loose man
Man 1: She must be celebrating NationalDirty Slag Day then! XD
All: *laughs*