Any of several New World passerine songbirds, of the genera Toxostoma, Allenia, Margarops, Oreoscoptes and Ramphocinclus in the family Mimidae, that have a long, downward-curved beak.
A fan of thrash metal music.
A thresher shark.
One who thrashes.
threshing machine
How often have the words thrasher and threshing machine occurred in a corpus of books? (source: Google Ngram Viewer )