sagacious: having keen discernment and sound judgment
Sagacious means wise. So sagacious remarks may mean wise words.
Mean can mean you are being rude or in math terms it is adding a set of numbers then dividing by the total amount. ex. If your numbers are 1,2,and 3 add them to get 6 and divide by 3. You get 2.
1.not nice 2.rude and disrespectful to other people 3.opposite of nice 4.cruel 5.harsh through words or actions
It means that you stick a firecracracker in a cows ear!