An expression meaning "with no exception
s"; the Oxford English Dictionary
first cites it in 1866
, although use of the word "bar
" as a preposition
something go back two centuries earlier, deriving from the use of physical bars to prevent entrance to or exit from a building.
The Bar None was also a candy bar made by Hershey's Chocolate, first produced in 1986. The original version was layering of chocolate wafers, chocolate creme and peanuts, and came in a black and brown wrapper. In 1993 the bar and its packaging were changed; caramel was added and the wrapper became yellow. The bar stopped being produced at all sometime after 1996 when the nutritional information below was published in a CNN comparison chart.
Nutrition info for the later version of the bar (serving size 1 43-gram piece; there were two pieces in the package):