From Latin bestius, i ( "beast, animal" ) . 1o_ Small Animal, usually its use for insects, but as it is a derogatory can be called so any animal. See bug. 2o_ Affectionate way of addressing someone, by antiphrasis of the previous one. 3o_ By exaggeration is the virus or bacteria that causes an infectious disease. 4o_ As an adjective can be someone ugly (like an insect) or very skilled, cunning as small animals, to do good or evil.