FOSSer (English) comes from English FOSS, from Icelandic foss, from Old Norse fors, from Proto-Germanic fursaz, from Pre-Germanic pŕ̥sos, from Proto-Indo-European pers- — to sprinkle, to spatter.
FOSSer (English): A user or advocate of free open source software
Definitions
A user or advocate of free open source software
Ancestry of “FOSSer”, step by step
FOSSer traces back through two separate lines of ancestry.