Home › Words › T › thumbtackthumbtack/ˈθʌm.tæk/thumbtack · noun — A small nail-like tack with a slightly rounded head that can be pressed into place with light pressure from the thumb; used for hanging light articles on a wall or noticeboard.Definition from Wiktionary (CC BY-SA 3.0).thumbtack is pronounced /ˈθʌm.tæk/.EtymologyFrom thumb + tack.nounA small nail-like tack with a slightly rounded head that can be pressed into place with light pressure from the thumb; used for hanging light articles on a wall or noticeboard.e.g.“You say that I'm broke my nigga, how is that? Bitch I'm stickin to this paper like a thumbtack” — 2016 June 10, BlocBoy JB, “No Chorus, Pt. 5”, in Who Am I, 1:20–1:27:verbTo fix or attach something with a thumbtack.e.g.“On the particle-board partition that separated his cubicle from the next, Paul had thumbtacked things that might inspire him […]” — 1988, Edmund White, chapter 1, in The Beautiful Room is Empty, New York: Vintage International, published 1994:Definitions & examples from Wiktionary (CC BY-SA 3.0).