Aún no tenemos significados para "hear a plop".
1From a deep sleep, I woke to hear a plop-plop-thunk-plump sound against the tent.
2Just as I was going to unzip, I heard a plop in the creek.
3We heard a plop; Lady stopped and looked round.
4He felt something work free of his pocket an instant before he heard a plop on the pavement.