look up any word, like the eiffel tower:
1.) The last bit of time that peninosaurs walked the earth.
2.) A scab-like period, in which the poor girl bleeds clotted blood wads, that are...you guessed it... "crusty."
"Her Crustaceous period, caused her to bleed even more, as it cut her insides"
by Mattie Macabre November 10, 2007