Stycallus

Stycallus: /stī-‘kal-us/

1  : a small hardened, skin formation on the thumb(s).

1a : a tiny nubbin, an evolutionary outgrowth on the opposable thumb developed by excessive texting, swiping,  and twittering.

2  : the last biological outgrowth,  before human entropy accelerated in an unstoppable degradation with catastrophic results.

Origin : American English of stylus and callus

First use : today 2016