ポンと
1
with a pat;with a tap;with a clap;with a slap;with a smack
先生は私の背中をぽんとたたいた。
The teacher patted me on the back.
2
with a pop;with a crack
シャンパンの栓がぽんと音を立ててとんだ。
The champagne cork popped out.
3
casually (throw);carelessly
4
generously (give)