Etymology

"To destroy this invisible Government, to dissolve the unholy alliance between corrupt business and corrupt politics is the first task of the statesmanship of the day." - 1912 Progressive Party Platform, attributed to TR and quoted again in his autobiography where he connects Trusts and monopolies (sugar interests, Standard Oil, etc.) to Woodrow Wilson, Howard Taft, and consequently both major political parties.

Noun

1. a coalition among seemingly antagonistic groups, especially if one is religious, for ad hoc or hidden gain. (See examples under "In literature:")
2. parody of same. (See examples under "Unholy Alliance may refer to:")