那我走了

then I'll go

→ 那
phrase Rare #22,209
then I'll go A casual phrase used when saying goodbye or announcing that you are leaving. 那 means “then” or “in that case,” and 走了 literally means “am leaving” here.
CH: 时间不早了,那我走了。
EN: It's getting late, so I'll go.

那我走了

Well, I’m leaving then.

— 真爱至上 (2003)

好啦那我走了

Alright then, I'm off.

— 饮食男女 (1994)

那我走了

Then I’ll be going…

— 春光乍泄 (1997)

二明那我走了

Er Ming, I’m heading out then.

— 洗澡 (1999)

是啊那我走了

Yeah, then I'll get going.

— 起风了 (2013)