no kidding
US /noʊ ˈkɪd.ɪŋ/
UK /noʊ ˈkɪd.ɪŋ/

1.
tidak bercanda, serius
used to emphasize that what one is saying is true or to express surprise or agreement
:
•
I saw a UFO last night. No kidding!
Aku melihat UFO tadi malam. Tidak bercanda!
•
He actually finished the entire marathon. No kidding!
Dia benar-benar menyelesaikan seluruh maraton. Tidak bercanda!