Green’s Dictionary of Slang

(US) to tread or trample; to beat up.

1958		H.E. Bates Darling Buds of May (1985) 53: I shall waffle down to the pub and grab a bite of cold.
1977		S. Stallone Paradise Alley (1978) 154: Don’t play patty cakes with this turd – Waffle ’im – Waffle the turd.