Definition of kickin':
(n) :
The action of the verb to kick.
(n) :
A violent assault involving repeated kicks.
(adj) :
(slang) Alive, active (especially in the phrase alive and kicking).
(adj) :
(slang, of a party or event) Actively ongoing and enjoyable.
(adj) :
(slang) Terrific, great (of clothes) smart, fashionable.
(n) :
(slang) A great loss or defeat; licking.