Coming home in the morning after staying out all night (e.g., partying); a colloquial term often implying disapproval or concern.
昨夜は飲み会が長引いて朝帰りしてしまった。
Last night the drinking party ran late and I ended up coming home in the morning.
彼は週末によく朝帰りするので両親が心配している。
He often comes home in the morning on weekends, so his parents are worried.
朝帰りをした息子を母親が叱っていた。
The mother was scolding her son for coming home in the morning.