Poy \Poy\, n. [OF. apui, apoi, a support, prop., staff, F. appui, fr. OF. apuier, apoier, to support, F. appuyer, fr. [`a] to (L. ad) + OF. pui, poi, a rising ground, hill, L. podium. See {Podium}, {Pew}.] 1. A support; -- used in composition; as, teapoy. 2. A ropedancer's balancing pole. --Johnson. 3. A long boat hook by which barges are propelled against the stream. [Prov. Eng.] --Halliwell.