rat race
/ˈɹæt ˌɹeɪs/noun
RareNot in standard dictionaries
1
An activity or situation which is congested with participants and which is hectic or tedious, especially in the context of a busy, modern urban lifestyle.
2
The busy, modern urban lifestyle itself, especially when seen as a competition for wealth or power.
3
Inconsiderate or unfair competition, where the competitors are willing to use any means to win.
#informal