Obed looked over his shoulder, peering at me with his little short—sighted pig's eyes, into which, in my potvaliancy, I immediately chucked half a tumbler of very strong grog, and under cover of it attempted to bolt through the scuttle.
-- Michael Scott, Tom Cringle's Log
His bursts of potvaliancy (the male side of the maiden Panic within his bosom) are awful to his friends.
-- George Meredith, Beauchamp's Career, Volume 1
Potvaliancy combines the original sense of pot as "drinking cup" with valiancy, which derives from the verb valere, "to be strong."