The term "squeak" can have several meanings depending on its context.
1) It may refer to a high-pitched sound made by something that is moving or being rubbed together, such as two pieces of metal touching each other. This type of squeaking noise is often caused by friction and the presence of small particles between the surfaces in contact.
2) In another context, "squeak" can mean to make a very quiet sound without making much noise or disturbance. For example, someone might say they are trying not to squeak while walking on a creaky floor.
3) The term may also be used as an expression of surprise or disapproval, similar to saying "Oh!" or "Eww!". This usage is often accompanied by a facial expression that conveys the same sentiment.