Something of outstanding merit. Normally used as a single word exclamation in Glasgow. (US equivalent may be 'Sweet!'). Similar to the terms stoater or dancer

Also may be used to describe a fine example of a mild misfortune, to placate the offended party.
Finding a fine shell on the beach at Largs wee Kenny showed it to Shug, who concurred it was a dullion.

Shug then punched wee Kenny in the face and stole the shell. When wee Kenny ran tae his Maw, she consoled him by saying:
"that wee shite Shug gave you a dullion of a black eye son"
by Craig McLaughlin March 17, 2007
Get the dullion mug.