Green’s Dictionary of Slang

1. (US black) to discard, to throw away, to throw.

1872		in Overland Monthly (CA) Nov. 439: Chuck ’em inter de smokehouse.
1884		J. Harrison ‘Negro English’ in Anglia VII 267: To chunk de chickens = to throw at the chickcens.
1906		J.W. Carr ‘Words from Northwest Arkansas’ in DN III:ii 130: chunk, v. To pelt, to throw missiles at. ‘About forty Preps were chunking a squirrel on the campus this morning and they killed him.’.
1911		H. Shearin ‘An Eastern Kentucky Dialect Word-List’ in DN III vii 537: chunk, v. To hurl or throw; e.g., ‘He chunked a rock at me’.
1919		D. Runyon in Little Rock Dly News (AR) 4 July 7/3: Bat Masterson and Charley O’Dell [...] are chunking their change in on Willard.
1934		E. Caldwell Tobacco Road (1958) 16: Quit chunking that durn ball at them there weatherboards, Dude.
1949		(con. 1943–5) A. Murphy To Hell and Back (1950) 204: I hope the krauts don’t start chunking artillery in this direction.
1957		G. Kersh Fowlers End (2001) 24: Bloody fleas—as soon as you chunk ’em out, the audience brings ’em back in again.
1983		R. Klein Jailhouse Jargon and Street Sl. [unpub. ms.].
1984		D. Jenkins Life Its Ownself 171: [H]e chunked the ball a mile into the twilight, and Lynn Swann jumped 10 feet off the ground and caught it.
1985		Eble Campus Sl. Oct. 3: chunk it – discard; eliminate something. ‘The cheese was molded so Leslie decided to chunk it in the garbage.’.
1997		D.H. Edwards The World Don’t Owe Me Nothing 44: I got up at the barrelhouse, playing my guitar, and them old women got drunk and started to hollering, going on, chunking that money at me.

2. (US) to ejaculate.

1969

‘Iceberg Slim’ Pimp 79: My twenty-one month ‘cherry’ was aching to chunk out.

3. (US campus) to batter, to beat up; to fight.

1834		‘Jack Downing’ Andrew Jackson 62: The Injuns [...] were either chunk’d on the canister, scragged, or bagnetted .
1971–2		C. Shafer ‘Catheads [...] and Cho-Cho Sticks’ in Abernethy Bounty of Texas (1990) 201: chunkin’ it, v. – fist fighting.
1997–2000		Da Bomb 🌐 7: Chunk: To beat somebody up.

4. (US campus, also chunk it) to vomit [+ ref. to blow (one’s) chunks under blow v.¹ ].

1989		P. Munro Sl. U.
1997–2001		Online Sl. Dict. 🌐 chunk (one’s) cookies v 1. to vomit. (‘Don’t drink too much, or you’ll chunk your cookies.’).
2000		F. Kellerman Stalker (2001) 143: Joey Goudis got drunk and chunked on Andy Lopez.
2012		M. Lacher On the Bro’d 37: When we went over some bumps I nearly chunked it on the dashboard.