sto·ic (stō'ĭk)
n.

One who is seemingly indifferent to or unaffected by joy, grief, pleasure, or pain.

Stoic A member of an originally Greek school of philosophy, founded by Zeno about 308 B.C., believing that God determined everything for the best and that virtue is sufficient for happiness. Its later Roman form advocated the calm acceptance of all occurrences as the unavoidable result of divine will or of the natural order.

adj. also sto·i·cal (-ĭ-kəl)

Seemingly indifferent to or unaffected by pleasure or pain; impassive: “stoic resignation in the face of hunger” (John F. Kennedy).

Stoic Of or relating to the Stoics or their philosophy.
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i was called this not too long ago for the first time...not sure whether to take it as a compliment or to run for the hills and hide my head in shame.