Erinaceous

Erinaceous \er-uh-nay-shus\, \ɛ.rɪˈneɪ.ʃəs\, \ˌɛ.rəˈneɪ.ʃəs\

adjective
1. Of, pertaining to, relating to, or resembling hedgehogs
2. John Watson (See: Martin Freeman)

"Is Martin Freeman erinaceous? "

"Yes: he laughs, he cries and then rolls himself into a little prickly ball and hibernates for the winter."