Solid Muldoons

A slang phrase; definition: a reliable source, someone who can be relied on when needed.

Quotes

"The three types of tax lists included in this collection are "delinquent tax," "Solid Muldoons" (which constituted taxpayers of over $1000 worth of property), and..." - Idaho County, Idaho Newspaper Tax Lists, 1886-93

"...on himself, turning into an immortal stone-clay-flesh creature, hell-bent on increasing his ever-growing underground army of Solid Muldoons." Cracked.com, 5 Outrageous Archaeological Hoaxes.

"...to adapt himself to the solemnity of New York financial circles and his breezy Western way did not win the confidence of tho serious, solid Muldoons of this city." Why Mr. Shaw Quit, Boston Evening Transcript, Jan 30, 1908