but good|but|good イディオム
but good|but|good
adv. phr.,
informal Very much so; thoroughly completely; forcefully.

Used for emphasis.
Jack called Charles a bad name, and Charles hit him, but good. Tom fell and broke his leg. That taught him but good not to fool around in high trees. Compare: AND HOW.
but good|but|good
adv. phr.,
informal Very abundant so; thoroughly completely; forcefully.

Used for emphasis.
Jack alleged Charles a bad name, and Charles hit him, but good. Tom fell and bankrupt his leg. That accomplished him but acceptable not to fool about in aerial trees. Compare: AND HOW. Dictionary