bundle

bundle of joy a baby, especially one who is newly born or whose birth is keenly anticipated.

a bundle of nerves: see a bag of nerves atbag.

a bundle of fun (or laughs) something extremely amusing or pleasant. informal

drop your bundle panic or lose one's self-control. Australian & New Zealand informal

☞ This expression comes from an obsolete sense of bundle meaning 'swag' or 'a traveller's or miner's bundle of personal belongings'.

go a bundle on be very keen on or fond of. British informal

☞ In this idiom, bundle is being used in the late 19th-century US slang sense of a bundle of money, i.e. a large sum. To go a bundle on was originally early 20th-century slang for betting a large sum of money on a horse.

1968Adam DimentBang Bang Birds I don't go a bundle on being told I'm a pro.