I'll shake your bouncy booty
Means you're so pumped to beat them you're literally vibrating with excitement. Like you're a cartoon character about to burst.
'I'll shake your bouncy booty', I was that hyped I did a cartwheel before the fight.
'I'll shake your bouncy booty', I was so ready I brought a whoopee cushion to the match.
'I'll shake your bouncy booty', I was so excited I peed on their shoes.