I think this word means: Due to a mis-fire with the mouse on account of doing two words of the day at once, I accidentally viewed the definition for this word:

\lam-BAYST, transitive verb:
1. To give a thrashing to; to beat severely.

2. To scold sharply; to attack verbally; to berate.

Remark: I deserve a lambasting for the failure of today’s word of the day.