Agile (horse)
WordNet
adjective
(1) Moving quickly and lightly
"Sleek and agile as a gymnast"
"As nimble as a deer"
"Nimble fingers"
"Quick of foot"
"The old dog was so spry it was halfway up the stairs before we could stop it"
(2) Mentally quick
"An agile mind"
"Nimble wits"