Adjective; chiefly Scot.
1. Unintelligent, Stupid, or face-palmingly moronic.
2. Smug, self-superior.
3. Lickspittle, Brown-nose.
Often used in reply to stupid comments, that often lack self-awareness.
"There's been a Murdo."
Etymology: 1. Play on catchphrase of classic Scottish detective tv drama Taggart. "There's been a murder."
2. Gained popularity in reference to unelected conservative member of Scottish parliament Murdo Fraser, known for his smugness, lack of intellect, and general uselessness.