locking horns (verb) lock horns: fight with
Sinonime: Band-Aid, ad-lib, autoschediastic, extemporaneous, extempore, extemporized, fly-by-night, hit-or-miss, impromptu, improviso, makeshift, offhand, spontaneous, spur-of-the-moment, unprepared, unrehearsed, unstudied
Antonime: designed, planned, premediated, rehearsed