Finnish word samppis comes from Finnish -is

Detailed word origin of samppis

Dictionary entry	Language	Definition
-is	Finnish (fin)	(colloquial) -er; a suffix used to form nouns and proper nouns from place names, common nouns and adjectives; gives a familiar nuance to the original word; the original word is often truncated in the process.
samppis	Finnish (fin)	(colloquial) champagne.

Words with the same origin as samppis