A wingman who provides you an excuse to ditch a date, usually by calling or texting at a prearranged time. The recipient of the call or text can choose whether to use the ditchman as an excuse or not, depending on how the date is going.
Did you hear about that asshole in Austin who's suing a girl for texting in a movie he took her to? I guarantee that was her ditchman texting because he was a creep.
old english phrase dating back to the 1700s, which plays on the double meaning of dull (boring/opaque).
modern english and american english also uses the phrase "dull as dishwater", probably evolved through mispronounciation and familiarity with the latter.
"andy has a new girlfriend but i can't understand why, she is as dull as ditchwater"
"wear the purple one, that black dress is dull as ditchwater"
A liquid, foul smelling shit usually a dark green color as a result of food poisoning. The odor is reminiscent of a piece of roadkill that was knocked off into a ditch full of dank, brackish, water.
"Don't go in there, I just left a ditchwater surprise behind, you don't want to smell that."