首が回らない

くびがまわらない

being over one's head (in debt, etc.); being up to one's neck (in debt); being unable to turn one's head

Also written 首がまわらない

Meaning

exp
being over one's head (in debt, etc.); being up to one's neck (in debt)
exp
being unable to turn one's head

Example sentences

彼は今借金で首が回らない。

He is deeply in debt now.
借金で首が回らない人もいる。

Some people are up to their necks in debt.
ぼくは借金で首が回らないよ。

I'm up to my ears in debt.