noun
easy task; piece of cake; cinch
Idiomatic expression meaning something is very easy to do; often used in the phrase お茶の子さいさい (piece of cake).
こんな仕事はお茶の子さいさいだよ。
This kind of work is a piece of cake.
彼にとってはお茶の子みたいなものだ。
For him, it's like a cinch.
noun
cake served with tea; light snack
Literal meaning: a small cake or snack eaten with tea. This sense is less common than the idiomatic use.
祖母はいつもお茶の子を用意してくれた。
My grandmother always prepared a light snack to go with tea.