birthday boy

plural birthday boys

1. A man or boy who is celebrating his birthday.

   The birthday boy was a 65-year-old man who was half-asleep.

   2005, Stephen Kogon, Max Mooth—Cyber Sleuth and the Case of the Zombie Virus, page 90

   2 more examples

   The party was to be from two to five o'clock, and Sunny Boy, in his best white flannel suit, and carrying Oliver's present under his arm, started about quarter of two for the birthday boy’s house.

   1922, Ramy Allison White, Sunny Boy and His Playmates, The Echo Library, published 2006, page 49

   When they came out of the restaurant, Quinn noticed the birthday boy appeared tipsy but he was twenty-one now, and everyone was having a good time.

   2006, Aileen M. Buckley, From the Driver's Seat, page 108