English Dictionary

since when

adv

(colloquial, rhetorical question, sarcastic) From what time. / (colloquial, rhetorical question, sarcastic) (as an interrogative interjection) Used to indicate doubt as to the veracity of a statement.

Since when did you start playing the guitar?

意味（1）

(colloquial, rhetorical question, sarcastic) From what time.

Since when do I need your permission?

意味（2）

(colloquial, rhetorical question, sarcastic) (as an interrogative interjection) Used to indicate doubt as to the veracity of a statement.

The moon is made of green cheese. Since when?