Definition from Wiktionary, the free dictionary
pushpin (plural pushpins)
- A thumbtack.
2009 January 28, “Mexicans turning to black magic in hopes of defeating U.S.”, in Toronto Star:
- An illustration showed a pair of scissors slicing off the leg of a doll […] stuck with pushpins.
- (archaic) An old children's game where pins are placed on a table and each player tries to push his pin so as to cross the other's.
thumbtack — see thumbtack