1. (US, later use US black) a police officer [a typical Irish name; US police were stereotypically Irish].
|Current Sl. V:2.|
2. (US) the truth, the real thing; something or someone dependable [abbr. ‘the solid Muldoon’, popularized by ‘Muldoon the Solid Man’, a vaudeville song by Harrigan and Hart (1874)].
|[||‘English Sl.’ in Eve. Telegram (N.Y.) 9 Dec. 1/5: Let us present a few specimens:– [...] ‘Like Muldoon, he is a solid man.’].|
|Bill Nye and Boomerang 182: Go to your husband [...] Lean on him. He will be your solid muldoon.|
|Soldiers Three [story title] The Solid Muldoon.in|
|(con. 1890s) Tenderloin 170: The madams ain’t givin’ us the solid Muldoon on this thing.|
3. (US Und.) a stolen credit card.
|in Pileggi Wise Guy (2001) 20: ‘Paulie called stolen credit cards “Muldoons,” and he always said that liquor tastes better on a Muldoon’.|
4. a run-of-the-mill individual.
|Wire ser. 3 ep. 1 [TV script] I don’t want to be just another Muldoon, like Dominic DePietro, warming the back bench.‘Time After Time’|