friend-in-law

== English == === Etymology === From friend +‎ -in-law, by analogy with mother-in-law, father-in-law, sister-in-law, brother-in-law, etc. === Noun === friend-in-law (plural friends-in-law) (humorous) A friend by association rather than choice, such as the friend of a partner, spouse or other friend; an acquaintance.