crazier than a rat trapped in a tin shithouse
Phrase old fuckers used to use to describe really fucked-up seemingly normal people. All bets are off in this situation because now this means the batshit crazy person loses their shit pretty fast and wants to fuck someone up real bad. My advice: run. The short modern version is: crazier than a shithouse rat. The clean version is: crazier than a rat trapped in a tin hen-house, but dont' even use this version around more than three women who are over 30 or they will fold their arms, lower their head a little while glaring at you --like you just offended their pussies.
That Jenkins is "crazier than a rat trapped in a tin shithouse"