Thank you, aldi.
I have no idea what the OED means by the following:
Etymology: Origin uncertain; perhaps < nip n.3 + and conj.1 + tuck n.1
(nip, n.3 a sharp remark or comment, a slight rebuke, reproof or sarcasm obs.) (tuck, n.1 a fold or pleat in drapery)
which, apart from the phrase “Etymology: origin uncertain”, seems to me to have nothing whatever to do with the price of cheese.
I suppose the inquest on “nip and tuck” must return an open verdict for the present. Let’s hop over to another thread, and see whether the ley lines lay or lie to the lee of the lea, or maybe of the loo......