Word Origin & History
gut
O.E. guttas (pl.) "bowels, entrails," related to geotan "to pour," from PIE *gh(e)u- "pour." Related to M.Du. gote, Ger. Gosse "gutter, drain," M.E. gote "channel, stream." Meaning "easy college course" is student slang from 1916, probably from obsolete slang sense of "feast" (the connecting notion is "something that one can eat up"). Sense of "inside contents of anything" (usually pl.) is from 1580. Figurative pl. guts "spirit, courage," first recorded 1893; hence gutless "cowardly" (1915). The verb meaning "to remove the guts of" (of fish, etc.) is from c.1300. To hate (someone's) guts is first attested 1918. Gut reaction is 1963, probably a back-formation from gutsy (1936) "tough, plucky."