☆ Slang a capsule containing amyl nitrite or, now more commonly, butyl nitrite, used as a stimulant
Popper,
Sir Karl Raimund 1902-94; Brit. philosopher, born in Austria
See popper in American Heritage Dictionary 4
noun
One that pops.
A container or pan for making popcorn.
Slang An ampoule of amyl nitrite or butyl nitrite, used illicitly to induce euphoria and enhance sexual stimulation.
British philosopher known for his contributions to the understanding of scientific reasoning and his attacks on historicism. His works include The Logic of Scientific Discovery (1931) and The Open Society and Its Enemies (1945).