chuck in verb 2chuck-in noun 1forms 4 verb2 •(slang) To give up, to quit.28 May 2000, St. Petersburg Times - The good and the bad of Spanish travel writing Series: BOOKS Rather he gives a convincing impression of someone who wants to chuck in his old life in England and build a new life, not just a summer villa, •(slang) To contribute (something) as a bonus; to throw in (something). chuck-in noun1 •(Australia, slang) A piece of good luck. formschucked in · chucking in · chucks in · chuck-ins