Started off meaning a sore one. ie in a fight you could take a sore punch. (yin = one)

But now its turned completely around and it means something is very good.

Some people still use it to describe a sore knock on the head.

Scottish slang.
oohh he took a dull yin there. (old meaning)

you seen jimmy's new car? aye its a dull yin eh? (new meaning)
by wee sax November 8, 2007
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very boring, or miserable.

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"
by miss moo March 25, 2006
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A dull crayon is most obviously a crayon which is dull. This word can also be used as an insult because just like nobody likes a dull crayon, nobody likes the person called a dull crayon.
by definerofworlds June 20, 2010
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This is what happens when you take a messy shit that your sphincter won't cut off.
I had to use two rolls of toilet paper to take care of that dull cutter.
by Biggussar January 27, 2008
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Some who is searching for a pulse in any given scene because they carry dead dreams.
Ben is a dull boy because he doesn't have a girl friend and the girl that was his girlfriend did in fact cheat on him.
by Cherrera April 24, 2016
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A less pure form of cocaine. Sometimes has a grey / tannish appearance to it.
That was some B class dull silver bro. My fuckin nose is bleeding.
by Ziobear2 July 29, 2018
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a dull object is a dullened object such as A stick, A sword, or even a rock
by ThatSoFunny November 10, 2007
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