nebuchadnezzar, n. — Green’s Dictionary of Slang

nebuchadnezzar n.

[Nebuchadnezzar II, (c.630–c.562 BC) King of Babylon; play on greens n.¹ and the King’s madness, during which period he ate grass]

1. the penis.

1890–1904

2. a vegetarian.

1984

Partridge DSUE (8th edn) 783/1: ca. 1870–1910.

3. (Aus.) a salad.

1955

N. Pulliam I Travelled a Lonely Land (1957) 236/1: nebuchadnezzar – salad.

take Nebuchadnezzar out to grass (v.)

of a woman, to have sexual intercourse.

1890–1904		Farmer & Henley Sl. and Its Analogues.
1980		Maledicta IV:2 (Winter) 197: Those derived from the words for the penis or vulva include to take Nebuchadnezzar out to grass, where grass = greens (from Priapus as a garden god as well as a phallic deity).