Off-the-cuff =without preparation.

• I hadn’t prepared a speech so I just said a few words off-the-cuff.
• It was just an off-the-cuff remark.
• I am not very good at making speeches off-the-cuff.

Small talk = polite conversation about unimportant or uncontroversial matters ,especially as engaged in on social occasions.

• It was just small talk really.
• I don’t enjoy parties where I have to make small talk with complete strangers.

In the same breath = more or less at the same time, or at once.

• You say he treats you badly but in the same breath you tell me how much you love him.
• She says the treatment is safe , and then in the same breath says that patients should be warned about the possible side-effects.