Green’s Dictionary of Slang

weeping willow n.¹

a pillow.

1880		D.W. Barrett Life and Work among Navvies 43: When a man is ready to retire to rest, he will inform his mates, ‘That he’s done his lot for the day, and is goin’ to lay his pen’oth o’ bread (head) on the weeping-willow (pillow), and do a little bo-peep (sleep).’.
1902		Bulletin (Sydney) 18 Jan. 16/3: Why my-blanky knock-me-silly takes up so much of the ocean floor that there isn’t awful-doom enough for me to get my rosy-red down onto the weeping willow.
1914		N.Z. Truth 31 Jan. 2/8: I went up the apples and pears [...] to the shovel and broom (to my room), put my lump of lead on the weeping willow [...] and ploughed the ocean deep.
1925		(con. WWI) Fraser & Gibbons Soldier and Sailor Words 301: Weeping Willow: Pillow.
1935		A.J. Pollock Und. Speaks.
1942		D. Runyon in Star (Marion, OH) 31 July 6/8: I will now [...] climb into the roses red, place the lump of lead on the weeping willow and plow the deep.
1953		Berrey & Van den Bark Amer. Thes. Sl. (2nd edn).
1969		S.T. Kendall Up the Frog 17: There I am wiv me loaf o’ bread on the weeping willow.
1971		J. Jones Rhy. Cockney Sl.
1983		R. Aven-Bray Ridgey-Didge Oz Jack Lang 52: Weeping Willow Pillow.
2002		B. Kirkpatrick Wicked Cockney Rhy. Sl.