an acid test

a test which will really prove the value, quality, or truth of something The new show was well received but viewing figures for the next episode will be the real acid test. The acid test for the product will be whether people actually buy it.

Common Names:

Name	Pronounced	Usage
Ealdr&Aelig;D	-	Anglo-Saxon
Kwasi	-	Western African, Akan
Tillie	TIL-ee	English
Wendy	WEN-dee	English
ÁLvaro	AHL-bah-ro (Spanish)	Spanish, Portuguese
Vibius	-	Ancient Roman