Boycott \Boy"cott`\, v. t. [imp. & p. p. {Boycotted}; p. pr. & vb. n. {Boycotting}.] [From Captain Boycott, a land agent in Mayo, Ireland, so treated in 1880.] To combine against (a landlord, tradesman, employer, or other person), to withhold social or business relations from him, and to deter others from holding such relations; to subject to a boycott.