vi ‧ per /ˈvaɪpə $ -ər/ BrE AmE noun [countable]
[ Date: 1500-1600 ; Language: French ; Origin: vipère , from Latin vipera , probably from vivus 'alive' + parere 'to give birth to' ]
1 . a small poisonous snake
2 . literary someone who behaves in an unpleasant way and harms other people