malarkey, loose cannon, good cop, hot-headed, caller

Guardian US

" Joe Biden, the occasionally foul-mouthed, frequently hot-headed caller of malarkey and all around loose cannon to Barack Obama's sophisticated good cop, is a career politician who has spent much of his time looking like the guy you can’t believe has made a career in politics. ... But I think he’s got a much better job lined up next."

good cop, bad cop

informal Used to refer to a police interrogation technique in which one officer feigns a sympathetic or protective attitude while another adopts an aggressive approach:questioners often play good cop, bad copfigurative the prime minister and chancellor were involved in a classic good cop, bad cop routine

loose cannon 

Pronunciation:

NOUN

An unpredictable or uncontrolled person who is liable to cause unintentional damage:most of the cop heroes in contemporary films are loners and loose cannons

hot-headed 

Pronunciation: /ˌhɒtˈhɛdɪd/ 

ADJECTIVE

Having an impetuous or quick-tempered nature:a hot-headed youth

caller 

Pronunciation: /ˈkɔːlə/ 

NOUN

1A person who pays a brief visit or makes a telephone call:a special advice line was swamped by hundreds of callersthe bailiff was a frequent caller

More example sentences

2A person who calls out numbers in a game of bingo or directions in a dance:a barn dance with a persuasive caller

malarkey 

Pronunciation: /məˈlɑːki/ 

NOUN

[MASS NOUN] informal

Meaningless talk; nonsense:don’t give me that malarkey

More example sentences

Origin

1920s: of unknown origin.