Green’s Dictionary of Slang

(US) soft and insubstantial.

1891		Century Mag. (N.Y.) Feb. 489: He reposes on three or four feather beds piled one upon another, a patchwork quilt being spread over the squshy mountain [DA].
1919		Jamestown Wkly Alert (ND) 1 May 2/6: ‘It felt sort of squooshy’ [...] The inspector inspected and dis overed that the stone was hollow and [...] in it was booze.
1946		(con. 1914) B. Marshall George Brown’s Schooldays 179: The girls were wearing sticking out skirts [...] and squoodgy little hats.
1947		Jrnl Times (Racine, WI) 15 Aug. 12/6: Big George Zaharias [...] planted a squooshy kiss squarely upon the lips of Mildred (Babe) Zaharias.
1957		J. Braine Room at the Top (1959) 75: He was squoo. Awfully sad and yet perky like a little monkey.
1957		Ottowa Citzen (Ontario) 23 Jan. n.p.: Grace Fields [...] coined a word [...] to describe Montreal’s slush-covered streets — squooshy.
1966		Windsor Star (Ontario) 28 May 58/4: Namu [a dolphin] was performing [...] Lee Meriweather had [...] patted him him. ‘He feels squodgy’.
1973		Edmonton Jrnl (Alberta) 18 Oct. 5/4: [headline] Kitchen revolt is under ay against that ‘squooshy’ loaf.
1982		S.F. Examiner The World 11 July 22/3: IUn the language of pillow advertising, squooshy has just been superseded by huggable.
1988		M. Atwood Cat’s Eye (1989) 245: The cabbage is going bad, it’s getting soft and squooshy.
1995		Orlando Sentinel (FL) 16 Feb. H8/5: Excellent bread shops have opened [...] offering ready alternatives to squooshy [...] white bread.
2003		Democrat & Chron. (Rochester, NY) 20 Dec. 23/6: Small children are squooshy and sweet.
2007		Boston Globe (MA) 16 Feb. 40/3: It’s a pleasant enough daydream before its turns squoodgy at the end.
2016		Chicago Trib. 3 Nov. 26/1: I boight a prosthesis (a squooshy fake breast).