What is stuck up meaning?

The term "stuck up" is used to describe someone who is excessively proud, snobbish, or conceited. A person who is stuck up considers themselves superior to others, and often looks down on those they perceive as being of a lower social status or class. They may behave in a haughty manner, refuse to socialize with people they deem beneath them, or act as though they are entitled to special treatment or privileges. The term "stuck up" can also refer to someone who is stubborn and unwilling to change their opinions or beliefs, even in the face of new information or contrary evidence.