In case you haven't heard the term before, "frogging" a piece means to unravel it and undo your stitches. The name comes from the fact that you have to "rip it, rip it" all out. Say that out loud a few times and you'll see exactly why someone was reminded of a frog. I'm not sure if knitters use the term as well (if there are any knitters out there, feel free to chime in), but frogging is definitely a word that you'll see a lot in the crochet community. Frogging is most commonly done when there's a mistake in the needlework or when you want to reclaim the yarn for some other purpose.
If the fibers of the yarn get twisted around each other too much, stop pulling and gently massage the tangled spot to loosen the fibers. This should help separate them enough for you to keep going. If it's a particularly difficult spot and that isn't working for you, I would recommend trying scissors next. Sometimes you can see the tangled spot and cut it loose, freeing the knot. Or, worst case scenario, you can just cut the yarn and reattach the two ends later (using a method like the Russian join). Do NOT just pull on the yarn even harder. This will make the knot even tighter and can lead to accidentally ripping your yarn apart (while simultaneously destroying your hands). No bueno. Even if you do succeed at breaking the knot with sheer force, it can often stretch out your yarn in that spot, making it noticeable thinner and susceptible to breaking. So don't do it! (Only you can prevent yarn abuse.)
Try to wrap your yarn loosely so that you don't stretch out the fibers. If you notice that your yarn is starting to get visibly thinner, then you're probably pulling it too tight.
That being said, with great power comes great responsibility. Some things definitely scream "Frog me!" and should be fixed sooner rather than later. But other times it may be better to just keep going (especially if you're simply tempted to give up on a pattern before it has a chance to take shape). Use your best crocheting judgement to decide whether or not it's worth undoing your hard work. But when it is time to "rip it, rip it," well, now you should have the tricks you need to make the frog your friend.
Do you have any additional frogging tips or insights? I'd love to hear 'em! Share your ideas in the contact section below or find me on social media. Happy hooking!