expression, godan verb (-ku)
encourage; urge on; push to act
Idiomatic expression meaning to motivate or prod someone into action, often by applying pressure or encouragement. Not a literal spanking.
上司に尻を叩かれて、やっと仕事を始めた。
Prodded by my boss, I finally started working.
彼はいつも誰かに尻を叩かれないと動かない。
He never moves unless someone pushes him.
expression, godan verb (-ku)
spank; hit on the bottom
Literal meaning: to strike someone on the buttocks, often as punishment for a child.
いたずらをした子供の尻を叩いた。
I spanked the child who had been naughty.