slap (someone) on the back

Translations
похлопать по спине
After the successful presentation, her colleagues slapped her on the back.
После успешной презентации коллеги похлопали её по спине.
Definitions
To congratulate, praise, or show approval to someone, often by literally patting or hitting them lightly on the back as a gesture of encouragement or celebration.
Words
back

noun
обратная сторона
slap

verb
шлёпать