ˈlow life noun

1. [uncountable] the life and behaviour of people who are involved in criminal or immoral activities:
a novel about low life in Chicago in the 1930s

2. (also lowlife) [countable] American English informal someone who is involved in crime or who is bad:
Pete turned out to be a real lowlife.
—lowlife /ˈləʊlaif $ ˈloʊ-/ adjective American English informal:
Charlie may be lowlife, but he isn’t stupid.

[TahlilGaran] Dictionary of Contemporary English ▲

low life
the behaviour and activities of people from a low social class, especially criminal activities.
She worked as a prostitute and experienced the harsher side of Parisian low life.

[TahlilGaran] English Idioms Dictionary ▲