is his problem
Das ist sein Problem, nicht meins.
That's his problem, not mine.
Sein Gewicht ist sein Problem, nicht meins.
His weight is his problem, not mine.
Das beste Mittel ihn loszuwerden, ist sein Problem zu bekämpfen.
The best way to get rid of him is to tackle his problem.
— Taxi (1998)
Das ist sein Problem, nicht meines.
That’s his problem, not mine.
Er ist sein Problem endlich los.
He's finally rid of his problem.
That’s his problem.