On somebody's back or shoulders.

(transitive) To carry (someone) on the back or shoulders. / (transitive, intransitive) To attach or append something to another (usually larger) object or event.

(countable) A ride on somebody's back or shoulders. / An act or instance of piggybacking. / (medicine, countable, uncountable) The connection of one intravenous drip to another.

Coloration of human, plant or animal tissue, especially by pigment.

simple past tense and past participle of pigeon-hole

present participle of pigeon-hole

plural of pigeon hole

plural of pigeon-hole

Third-person singular simple present indicative form of pigeon-hole

Alternative spelling of pigeonhole