Green’s Dictionary of Slang

(Aus. / US black) to leap, to jump.

1894		Truth (Sydney) 25 Feb. 1/5: Rev. T.S. Dean, who is an old New Zeakland hand, [...] has lately been frogging round the three islands.
1966		‘Tom Pendleton’ Iron Orchard (1967) 34: You little bastard, you better not use no hot water till I git there, or I’ll frog yo’ ass.
1969		‘Iceberg Slim’ Pimp 120: He frogged at least three inches off his stool.