1. "Pip" as a small sound:
* This theory suggests that "pip" refers to a small, weak sound, perhaps like the chirping of a bird or a squeak.
* This is supported by the fact that "pip" is sometimes used to describe a small, insignificant thing, like "a pip of a fellow."
* "Squeak" also refers to a high-pitched sound, typically made by small animals.
2. "Pip" as a small seed:
* This theory connects "pip" to the small seeds found inside fruits, like grapes and apples.
* The word "pip" has been used to describe small things since the 15th century, and the term "pip-squeak" could have emerged from this connection.
However, both theories have drawbacks:
* The exact origin of "pip" in "pip-squeak" remains unclear.
* There's no solid evidence directly linking the word to either of these theories.
Ultimately, the true origin of "pip-squeak" is uncertain. It's likely a combination of the two theories, with the word evolving over time through usage and association with small, insignificant things.
It's worth noting that "pip-squeak" became a common term in the 19th century, reflecting the increasing use of slang and informal language.