shrunken head
Refers to the preserved and shrunken human heads historically made by certain indigenous cultures, especially in the Amazon region.
博物館で干し首の展示を見た。
I saw an exhibition of shrunken heads at the museum.
Compound of 干し (hoshi, 'dried') + 首 (kubi, 'head'). The exact historical derivation is uncertain; the term is a straightforward descriptive compound.