Wild
Uninhibited, Extravagant, Rampant
noun, な adjective
ほんぽう
荒い (あらい) Wild, Rough
荒々しい (あらあらしい) Wild, Rough
奔放 (ほんぽう) Wild, Uninhibited, Extravagant, Rampant
暴走 (ぼうそう) Run Wild, Run Out Of Control
奔走 (ほんそう) Running About, Efforts, Be Busy
奔放 is a strong word. The ぽ is like a stress.
Books ほん and Po ぽう (ass in German) make him go Wild.