A freshman, as in college.
A high-school or college freshman.
Trying to open my car door with a coat hanger, I froshed the mechanism.
Origin of frosh
From Middle English frosch, from Old English frosc (“frog”), from Proto-Germanic *fruskaz (“frog”), from Proto-Indo-European *prew- (“to jump, hop”). Cognate with West Frisian froask (“frog”), Dutch vors (“frog”), German Frosch (“frog”), Norwegian frosk (“frog”), Icelandic froskur (“frog”). See also frosk, frog.