Sir Karl R. Popper, philosopher

Popper, in cricket a ball that rises sharply from the pitch when bowled ('pops up').

Poppers, the family of drugs that are a subset of a class of chemicals known as alkyl nitrites

John Popper, musician

Popper, a popping dancer

David Popper, cellist

Popper, an Australian brand name for a small Tetra Pak of fruit juice, complete with a straw, designed for individual consumption

Julius Popper, Romanian explorer

Meir ben Judah Loeb ha-Kohen Ashkenazi Poppers, Bohemian rabbi and cabalist; born at Prague

Marijuana popper, referring to smoking marijuana

Popper buttons, another term for "press studs"

Popper, a floating fishing lure or fly with a cupped or flat, forward-facing indentation that splashes or "pops" the surface of the water when tugged

Party popper, a small 'toy' commonly found at parties (especially New Year's) filled with confetti streamers and a small explosive charge to release them

Air popper, a type of popcorn maker

Siegfried Popper, Austrian naval constructor; born at Prague 1848

Popper (weapon), a nickname for an alleged energy weapon used by the United States military

Frank J. Popper, Rutgers urban planner

Popper, fried, bite-sized snack foods, especially a jalapeño pepper half which has been stuffed with cream cheese or cheddar cheese, breaded, and then deep fried

Popper is derived from the surname Frankfurter.^[1] Most are from the Czech Jewish family:

Albert Popper, Mayor of Vimperk, official doctor of the Schwarzenberg Princes.

Joachim Edler von Popper, Court Jew and lessee of the Habsburg tobacco monopoly. 2nd Austrian Jew to be ennobled. 1st Edler von Popper.