Green’s Dictionary of Slang

an amorous glance directed at a loved, or hopefully soon to be loved, one; thus goo-goo eyed.

1899		Ade Doc’ Horne 172: She’d had a lot o’ them cigarette children over in the corner, makin’ goo-goo eyes at ’em an’ talkin’ ’em to a standstill.
1901		‘Hugh McHugh’ John Henry 13: ‘I think it is awfully nice of you [...]’ says The Real Thing, throwing a goo-goo at me that settles everything. [Ibid.] 76: He’ll turn such a warm pair of goo-goo eyes on her that somebody will have to get up and yell for the fire department.
1904		Sydney Sportsman (Surry Hills, NSW) 22 June 3/5: And he tried to melt her with a gazelle of a goo-goo!
1905		Sun. Times (Perth) 2 Apr. 1/1: An elderly Midland magnate has a sharp optic for a pretty maid [...] he makes goo-goo eyes at the girls with all the ardor of adolescence.
1905		H. Green Actors’ Boarding House (1906) 11: She’d [...] had a row with Sam because the ingenue made goo-goo eyes at him. [Ibid.] 146: Mignon [...] made goo-goos at Mr. Sinclair. [Ibid.] 280: This Dottie girl was always throwing the goo-goo lamp on him.
1913		Sport (Adelaide) 29 Nov. 4/1: Dan H was making googoo eyes at the girl in the carriage.
1914		F. Dumont Darkey Dialect Discourses 14: I notis lots ob goo-goo eyes going on and sly glances.
1914		Sport (Adelaide) 7 Mar. 5/2: Joe Mc. was seen [...] making googly eyes at the pretty girlsl.
1915		Hargreaves & Godfrey [perf. Ella Shields] Oh, the baa-baa-baa lambs 🎵 Dressed up in his Sunday best and guaranteed to kill / Making goo-goo eyes at every passing frock and frill.
1919		F. Hurst ‘Even As You And I’ in Humoresque 278: We saw him throwing goo-goos at Albino.
1920		Marvel 7 Aug. 9: His heart is as soft as butter as it is, and I don’t want it melted to oil by dose goo-goo glances.
1925		Odum & Johnson Negro and His Songs (1964) 239: Ev’ry time she comb her head, / She make dem goo-goo eyes.
1933		W.R. Burnett Dark Hazard (1934) 15: I don’t make goo-goo eyes at a lot of morons, then stick ’em up between two chairs and walk on ’em.
1934		(con. 1920s) J.T. Farrell Young Manhood in Studs Lonigan (1936) 442: Ah’ll tear your eyes out, Gloria, if you all start making those oogle eyes at my big man.
1937		West. Mail (Perth) 27 May 43/1: Struth, what a life! Her goo-goo eyes they has me crwling at her feet.
1945		(con. 1900s) S. O’Casey Drums Under the Windows 52: He could fancy Ruth standing there in that field [...] creamy face, rosy cheeks, and big brown goo-goo eyes.
1950		J. Weidman Price Is Right 123: I thought I was hired to make with the typewriter instead of with the googoo eyes.
1965		(con. 1910s) Carmichael & Longstreet Sometimes I Wonder 35: The sporting women were always giving him the goo-goo eyes — as the term was then.
1975		L. Rosten Dear ‘Herm’ 149: The Old Man and ‘Eppie’ are casting mushy goo-goo looks at each other.
1985		R.G. Barrett You Wouldn’t Be Dead for Quids (1989) 49: They had googoo eyes and were holding on to each other.
1988		(con. 1940s) C. Bram Hold Tight (1990) 15: He was slightly miserable. Still, better that than goo-goo eyes.
1990		R. Doyle Snapper 51: Givin’ the goo goo eyes to a fuckin’ eclair. It was pat’etic, it was.
2000		Guardian Rev. 15 Jan. 5: David Schwimmer’s goo-goo eyes have got even more goo-goo.
2007		L. Redhead Cherry Pie [ebook] ‘I saw you too making goo-goo eyes’.
2016		T. Robinson Rough Trade [ebook] ‘I can’t sit here and watch you two make goo-goo eyes’.
2021		T. Swerdlow Straight Dope [ebook] [S]he was all goo-goo eyed for him.