Douchecapades
Any act that makes a person a douche or makes them look like a douchebag. Can include self-indulgent or any act that enhances or exemplifies the subject douche.
Dude 1: Did you hear? That guy gives money to the homeless.
Dude 2: That's just one of his many douchecapades lately.
Dude 2: That's just one of his many douchecapades lately.