noun
tempura donburi; tempura rice bowl
A bowl of rice topped with tempura, often drizzled with a sweet-savory sauce. Abbreviation of 天ぷら丼.
今日のランチは天丼にしよう。
I'll have tempura rice bowl for lunch today.
この店の天丼はエビが大きくて美味しい。
The tempura rice bowl at this restaurant has big shrimp and is delicious.
noun
repeating the same gag; running a joke into the ground
Colloquial comedy term for repeating the same joke or silly line, often to the point of annoyance. Derived from the idea of 'tempura' (てん) being repeated (丼).
彼の漫才は天丼が多くて、すぐ飽きる。
His comedy routine has too many repeated gags, and I get tired of it quickly.
そのギャグ、もう天丼になってるよ。
That joke has already been run into the ground.