rootin' tootin'
Concise Oxford English Dictionary © 2008 Oxford University Press:
rootin' tootin'
▶adjective N. Amer. informal boisterous, noisy, or lively.
– origin C19: reduplication of rooting in the sense ‘inquisitive’, an early dial. sense of the compound.
'rootin' tootin'' also found in these Oxford entries:

