noun► for shits and gigglesfor no good reason. Something is done, for example, for shits and giggles US, 2001.► put the shits up someoneto frighten someone UK, 2002.► the shits1. diarrhoea UK, 1947.2. the worst US, 1971.3. fear. Following logically from the earlier sense as 'diarrhoea' UK, 1967