A toxic work environment is one in which bad management and negative attitudes leave you tired, depressed, or ill.
Of course, some of us feel like this after a tough day at work anyway – particularly if you don’t like you job. But workplace toxicity is directly related to your professional surroundings rather than your individual circumstances. If your office is cliquey or gossipy, you witness bullying or a general lack of trust, or your colleagues’ ideas and good work tend to get disregarded, it’s fair to say your work environment is toxic.
Source: https://resume.io/how-to-deal-with-a-toxic-work-environment