Meanings
plural birthday buddies
- colloquialA person who shares the same birthday as another person.
In other words, the question is not what are the odds of a particular pair of people sharing a birthday but of any pair of people, from all the different possible pairings, being birthday buddies.
2018, David Darling, Agnijo Banerjee, Weird Math: A Teenage Genius and His Teacher Reveal the Strange Connections Between Math and Everyday Life, New York City: Basic Books, →ISBN, page 481 more example
Our lovely son had made his appearance, sharing a birthday with French playright Molière, Welsh actor and musician Ivor Novello and civil-rights campaigner Martin Luther King Jr. Not a bad pedigree of creative and inspirational birthday buddies. Oh, yes, Google also informs me that the online resource Wikipedia was launched on the very same day as Lukas.
2011, Sandra Harnisch-Lacey, Steve Stickley, People Like Us: Life with Rob Lacey, Author of The Word on the Street, Grand Rapids, Michigan: Zondervan, →ISBN, page 110Synonyms: birthday twin
Synonyms & antonyms
nounA person who shares the same birthday as another person.
Origin
Cite this entry
birthday buddy. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/birthday%20buddy
“birthday buddy.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/birthday%20buddy. Accessed November 4, 2026.
WatkinsX Dictionary, s.v. “birthday buddy,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/birthday%20buddy.
Source: birthday buddy on Wiktionary, CC BY-SA 4.0.