Green’s Dictionary of Slang

to whistle at a passing woman in an admiring, lustful way; thus wolf-whistling n; wolf-whistle adj., highly attractive.

1946		Times (Shreveport, LA) 27 June 1/8: He insisted on a promise from a vice president that the wolf whistling will stop.
1947		N.A.A.C.P. Annual Report 25: He allegedly had ‘wolf-whistled’ at Roy Bryant’s wife.
1955		Bal. Sun 2 Sept. 1/5: The Governor of Mississippi today called for a complete investigation of the kidnap-killing of a Negro youth who allegedly wolf-whistled at a white woman.
1961		Wodehouse Ice in the Bedroom 41: Dolly Molloy unquestionably took the eye [...] Wolf-whisting is of course prohibited in the lobby of Barribault’s Hotel so none of those present attempted this form of homage.
1961		R.S. Close With Hooves of Brass 48: ‘Hey! Where’s our wolf-whistle waitress?’.
1976		S.J. Perelman letter 23 Feb. in Crowther Don’t Tread on Me (1987) 316: I’m [...] wolf-whistling the odd shapely female.
1989		H. Rawson Dict. of Invective (1991) 421: We also have the verb to wolf (here meaning ‘to seduce’ rather than ‘to gobble down food’) [...] and wolf whistle (an appreciative whistle, used both as a noun and a verb).
1991		W.T. Vollmann Whores for Gloria 51: Funny as the doggishly ugly faces of fortyish transvestite whores pursing their cheeks and loudly wolfwhistling at men.
2000		N. Barlay Crumple Zone 174: Vannies going past, windows down, wolfin’ at her, shoutin’ go on luv, give it some.
2007		Herald News (Passaic, NJ) 15 Apr. E7/4: Wolf-whistling: One or more fingers are inserted into mouth to shape the opening, allowing a much more forceful stream of air].
2018		Clarion-Ledger (Jackson, MS) 28 Aug. PA10/2: Till said goodbye and wolf-whistled at her.
2019		Leader-Post (Regina, Saskatchewan) 17 July NP2/3: Duterte outlaws sexist quips, wolf-whistling and catcalls.