имени́нник

nounmasculineanimatecountable

rare #19809

1.
birthday boy, birthday person, name-day celebrant
Сего́дня Ми́ша имени́нник — ему́ де́сять лет.
Misha is the birthday boy today — he's turning ten.
Strictly the person celebrating their name day; in modern usage normally the birthday person. The feminine is «именинница».
2.
hero of the day, man of the hour, guest of honour
По́сле побе́ды он ходи́л имени́нником.
After the win he walked around like the hero of the day.
Figurative, often in phrases like «сидеть именинником» (to sit there looking pleased with oneself).

Examples

Именинник задул свечи на торте.
The birthday boy blew out the candles on the cake.
Сегодня наш именинник получает много подарков.
Today our birthday boy is receiving lots of presents.
Все поздравляли именинника с днём рождения.
Everyone wished the birthday boy a happy birthday.
Именинник, поздравляемый друзьями, был очень рад.
The birthday boy, being congratulated by his friends, was very happy.
Разрезание торта было доверено имениннику.
The birthday boy was entrusted with cutting the cake.
Повеселивший всех гостей тост подняли за здоровье именинника.
The toast that cheered everyone up was raised to the birthday person's health.

имени́нникbirthday boy; hero of the day
nounmasculine
имени́нницаbirthday girl; woman celebrating her name day; woman of the hour
nounfeminine