This is the 15210th most frequent Russian word.
поп
"Поп" in Russian means "priest" (specifically an Orthodox Christian priest).
Here, 'поп' refers to an informal term for a priest in Russian Orthodox Christianity, indicating its use in reference to a religious figure.
Поп вышел из церкви после службы.
The priest exited the church after the service.
In this sentence, 'поп' is used as an onomatopoeic representation of a bursting sound, demonstrating its application as a sound word.
Когда шарик лопнул, был громкий поп.
When the balloon burst, there was a loud pop.
The word 'поп' here is part of the term 'поп-музыка', which translates to 'pop music', referring to a genre of popular music.