Gouter means ‘to taste’, while the noun taste, can be un goût or un saveur.
It can also be a snack. In French schools, children have a little gouter (traditionally, a piece of buttered bread and chocolate) in the mid morning, and have another bigger gouter in the afternoon when they come home from school. Because French classes traditionally ended at 4pm, it is also known as le quatre-heure.
Parents grumble that a lot of kids prefer cochonerie (junk food or malbouffe) these days.
Collation is another word for a snack.
Image by Sarah Fleming from Houston, TX, USA