Third-person singular simple present indicative form of back-butter

plural of baby milk

(chiefly UK) Infant formula, especially that sold in liquid form.

present participle of go back in time

(slang) An obstetrician. / (slang) A midwife.

simple past tense and past participle of back water

plural of back-butt

(idiomatic, often followed by to) To try to remember a particular time or event; to think about something in the past.