Meaning

originBorrowed from Arabic بِنْت (bint, “girl, daughter”), from Proto-Semitic *bint-, used to denote a patronym. The term entered the British lexicon during the occupation of Egypt at the end of the 19th century, where it was adopted by British soldiers to mean "girlfriend" or "bit on the side". Its register varies from that of the harsher bitch to being affectionate, the latter more commonly…

Etymology from Wiktionary, CC BY-SA 3.0