Recalcitrant, you
boast yourself a dinosaur's
bone---rare find---but you
are just another mammal's turd:
perhaps prehistoric, but
just a turd nevertheless.
Kyakuchuu
Author's Notes/Comments:
As this is meant for an acquaintance lacking a shred of verbal skill and poetic finesse, I violated the classic form of the Tankam following the precedent established by Mokichi Saito.