Frombar +‎top.

bartop (pluralbartops)

1. Thetopsurface of abar(counter for serving drinks).
   • 2007 January 4, Michelle Slatalla, “Accessorizing at the Buena Vista Scrabble Club”, inNew York Times‎^[1]:

     And as effortlessly as a drunken gunslinger sweeps abartop full of shot glasses onto the saloon floor, the wind upended all the potted plants on the porch.

• topbar