As a Noun: 1. Behaviour which is foolish or childish. English = silliness. 2. Language or behaviour which is rude and offensive. English = crudeness, grossness, coarseness. 3. A serious and stupid mess, muddle or mistake. Vulgar English = fuckup. As a Verb or Adjective: 1. To behave in a foolish or childish way. English = (be) silly, (be) ridiculous, (be) absurd. 2. To be very foolish or childish. English = (be) silly, (be) ridiculous, (be) absurd. 3. Of language or behaviour, to be rude and offensive. English = (be) crude, (be) gross, (be) coarse.