decomposing

در رابطه با جسد به معنی یعنی در حال پوسیدن

So this is the first time I have seen this. Eyes popping out. Yes.
? But why does she look like so “built” in the upper body

May be because her body is already decomposing. So gases and juices build up inside.

Decomposing woman : خانم در حال پوسیدن ( جسد )

verb
1 : to cause something ( such as dead plants and the bodies of dead animals ) to be slowly destroyed and broken down by natural processes, chemicals, etc.
[ obj]
◀️Bacteria and fungi help decompose organic matter.
◀️partially decomposed bodies
[no obj]
◀️
The wood on our deck is beginning to decompose. [= ( less formally ) rot]
◀️the smell of decomposing leaves

synonym : DECAY

2 technical : to cause something ( such as a chemical ) to be separated into smaller or simpler parts
[ obj]
◀️decompose a chemical compound
[no obj]
◀️The compound will decompose in the presence of light.