Green’s Dictionary of Slang

(US) a newspaper.

1842		C. Mathews Career of Puffer Hopkins 135: If they only knew Mr. Flabby, what edits the ‘Empty Puncheon,’ or Mr. Busts, what conducts the ‘Daily Bladder’.
1886		Arizona Champion (Peach Springs, AZ) 25 Dec. 4/1: I’ve been accused of writing the funny column of the ‘Daily Bladder’.
1895		Dly Morn. Astorian (Astoria, OR) 4 Sept. 4/5: [headline] Some Extracts Reprinted From Astoria Daily ‘Bladder.’ Champion of the People.
1900		Marvel 15 May 14: Biggleton and his missus went down, bladders in hand.
1915		Day Book (Chicago) 21 Aug. 11/1: I have seen in the Daily Bladder, a local sheet sometimes called the Culumet, a signed statement by the then police captain.
1924		T.A. Dorgan in Zwilling TAD Lex. (1993) 18: Best sportin’ editor this bladder ever had.
1931		D. Runyon ‘Earthquake’ in Runyon on Broadway (1954) 164: The bladders [...] are asking what kind of a police force do we have.
1944		P. Kendall Dict. Service Sl. n.p.: newspaper [...] bladder.
1944		D. Runyon Runyon à la Carte 2: He is what is called a dramatic critic on one of the morning blatters.
1956		T. Thursday ‘The Big Squawk’ in Smashing Detective Mag. 15 Apr. 🌐 You and your blatter might be interested in a brand new, fresh-off-the-gun murder.
1960, 1975		Wentworth & Flexner DAS.