Green’s Dictionary of Slang

jive-ass n.2

[jive v.1 (3) + -ass sfx]

(US) one who loves fun or excitement.

[US]C. Shafer ‘Catheads [...] and Cho-Cho Sticks’ in Abernethy Bounty of Texas (1990) 204: finger-snapper/finger-popper, n. – usually a younger man who is always playing games; sometimes called a jiveass.