exuberance arising from an excess of energy; vivacity and good humor: The children romped on the lawn, full of animal spirits.
Origin of animal spirits
First recorded in 1535–45
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
cheerful and exuberant boisterousness
Word Origin for animal spirits
originally, referring to a vital force believed to be dispatched throughout the body by the brain
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012