In Germany common name for a intoxication. It has been used under "having (buying) a monkey (sitting)" since the beginning of the 19th century. The origin is not certain. Among other things, the phrase is said to be due to the alleged drunkenness of the monkey. A second variant mentions the similarity and thus confusion of the Czech expressions "opice" (monkey) and "opit se" (to get drunk). And a third says that this refers to the jugglers who used to appear at fun fairs with a monkey on their shoulder.