Quick definitions from WordNet (perked up)
▸ adjective: made or become more cheerful or lively ("His attention made her feel all perked up")
▸ adjective: (especially of ears) quickly lifted up or out in attention; `perched' is obsolete
▸ adjective: made or become more cheerful or lively ("His attention made her feel all perked up")
▸ adjective: (especially of ears) quickly lifted up or out in attention; `perched' is obsolete