Tiggerish 
adjective British
Very lively, energetic, and cheerful: his Tiggerish enthusiasm...
- I woke up feeling remarkably perky and Tiggerish.
- Appearing at the Glasgow International Comedy Festival, Byrne will hopefully give free rein to his Tiggerish hyperactive bursts that usually result in improvisational gold dust.
- McKeith is Tiggerish, and quite warm, in a steely kind of way.
Origin
From Tigger, a tiger in A. A. Milne's Winnie-the-Pooh, characterized by his vitality.