For some reason, people, in the last few years, have started calling duds "squibs". They are wrong. There are many people using the term. They are ALL wrong.
So, whenever anyone tells you that a bullet getting stuck in the barrel is a squib, laugh in their face, because they are wrong.
2muchfreetime, semantics aside, a squib or a dud, the end result is the same. If you encounter one you will not blow up your pistol unless you chamber and fire another round over the top. The pistol will not cycle on it's own, it's up to you to cycle it by hand and cause the KBOOM , not the "Squib".
Then if you decide to "laugh in the face" of a fellow handloader or shooter because they used the term "squib" instead of Alpo's choice "dud", you may find yourself in a different sort of bad situation. Best to forget the semantics and focus on the issue at hand.