(informal) That's a funny joke (often said to indicate that what has just been said is laughably unbelievable.)

(informal) Performing as well as one can.

(US) used to emphasize that one is behaving or going to behave in a trustworthy manner. / (dated) expected to do what one has promised, expected to uphold one's promise.

making somebody feel guilty.

(colloquial) The Devil.

Alternative form of that's a good one

(idiomatic, colloquial, dated) To drink alcohol excessively, to the point of being drunk.

(regional) day before yesterday

(formal) Held on one's physical body.

(authorship, informal) A character in a narrative work who is predestined to save the world or do some other grand and heroic accomplishment; one who is predestined to become the one