throw in

(noun) (rugby) an act or instance of throwing a ball in to put it into play. Synonyms: throw-in.

(verb) add as an extra or as a gratuity. Synonyms: throw in.

(verb) give up in the face of defeat of lacking hope; admit defeat. Synonyms: drop out, give up, fall by the wayside, drop by the wayside, throw in, throw in the towel, quit, chuck up the sponge. Example: "In the second round, the challenger gave up."

(verb) to insert between other elements. Synonyms: interject, come in, interpose, put in, throw in, inject. Example: "She interjected clever remarks."