A puny, weak, frail person; someone who can easily be defeated. This kind of peron should not pick fights with a larger, stronger person.
Little guy: You're an asshole! Let's take this outside!

Big guy: Don't fuck with me or I'll break you in half, you fucking pipsqueak!
by Laura March 19, 2005
A small person. A child or animal that is cute.
The pipsqueak is crying again.
by Morikahjo August 13, 2009
Typically word used to describe somebody of smaller size after theyve angered a group or person reason for being called a pipsqueak sorta the opposite of calling someone a long streak of duck shit
"Theyve done it again"
"The little pipsqueak, has gotten everyone together trying to take control because of greedyness and this angers us because he already has heaps more than some dont"
"Dont get started about what he does because youd be as angry as him doing the horrible things he does all the time, and anyone who sides with him or his kind is a squirt of piss just the same"
"But he injects people while theyre asleep causing sores and sickness, not once ever bothering to give the time of day to people while in the right state of mind"
"See, his greed, because hes a pipsqueak he feels a need to obtain more than his size"

"Maybe if he used the amount of drugs the same to his size he wouldnt have the problems he does"
*he could possibly be a she but continuing targets of educational experimentations are not informed of identities so no harm is done yet wasnt a problem because they gave the test subject plenty of drugs to subdue so if they did realise still nothings done.
by Ficticiousfan November 25, 2019
The sound a rodent makes when squished with the weight of a penis but not crushed.
theathleticblackpapifromhorner: We were fucking in the park and I pulled out and my dick flopped on a squirrel. Best pipsqueak of all time.
by gr8m8696969696969 April 21, 2017