hand-to-mouth

US /ˌhænd.təˈmaʊθ/
UK /ˌhænd.təˈmaʊθ/
"hand-to-mouth" picture
1.

having only just enough money to live on and nothing extra

:
Many families in the region live a hand-to-mouth existence.
After losing his job, he found himself living hand-to-mouth.