何したの

what did you do

→ 何
phrase Rare #27,137
what did you do A casual way to ask what someone did. It is a shortened form of 何をしたの, with the particle を omitted. Depending on context, it can also mean “what did you do to it?”
JA: 昨日の夜、何したの?
EN: What did you do last night?

ママとパパ今日は何したの

What did Mom and Dad do today?

今度は何したの

What did you do this time?

— ウィキッド ふたりの魔女 (2024)

私の眼鏡何したの

What did you do to my glasses?

ギータこそ何したの

What did Gita do, anyway?

— ダンガル きっと、つよくなる (2016)

私の車何したの

What did you do to my car?

— ワンス・アポン・ア・タイム・イン・ハリウッド (2019)

今日は何したの

What did you do today?

それで何したの

So, what did you do?