The joke's _____!”
nyt	1995	ONYX	Banded chalcedony
nyt	1995	ONYXES	They may make cameo appearances
nyt	1995	OODLES	Scads
nyt	1995	OOF	Response to a punch
nyt	1995	OOF	Sluggee's exclamation
nyt	1995	OOH	1978 Linda Ronstadt hit _____ Baby Baby"
The 2nd letter is N
The 3rd letter is Y
The 4th letter is O