Wiktionary
tin god
n. (context idiomatic English) An individual that abuses or exceeds his authority over others, frequently in petty ways; for example a low-level manager in situational comedies and other entertainment.
Usage examples of "tin god".
Nothing was mentioned about bowing down to a spoiled little tin god.
He thinks he's a little tin god on wheels--and honestly, it makes some people weak and sick just to think about him!
Not as long as that's what it is, as long as it isn't just another graven image, another tin God.