he wears a gray jacket
It's a military-style parka, basically (olive color). I've not been able to find the exact jacket he wears, but this one is pretty close: https://www.mysticarmynavy.com/item.cfm?RequestTimeout=500&ID=759
A "hart" is a kind of deer, and a "heart" is a vital part of the body.
he wears a trench coat type jacket
Yes, the noun 'jacket' is a common noun, a general word for any jacket of any kind.
Nehru
a book jacket is a cover for a book, atlas, or any other kind of book.
a mouth.
pea
A shrug is a jacket that just comes to the bottom of your rib cage. (but is generally knitted or croched) A bolero is also a kind of short jacket
Varsity jacket? It's a military jacket. Still trying to find out which one...
ecoustic guitars
He wore a maroonish ducati jacket. Like leather