My audio jack is definitely worn out and I need to get it replaced, as a temporary solution can I use my working phone's headjack as audio for my PC in any way, if I connect the phone and laptop together?
I use an android phone and windows PC laptop. Just so I'm clear I'll make sure I'm being understood ... I get that it's a bit complicated. Can I use my phone's headphone jack, with the phone connected to the laptop (via USB), and have my laptop audio streamed onto my phone's sound, and therefore through the headphones?
Socket yeah, sorry. It can work for about a second, as soon I let go of plug the sound cuts, I can't get it into a good position. Also it only works in one ear now. The headphones are fine though, they work on the phone.
The OP has a laptop not a desktop so a sound card is not a choice.
The USB is probably the cheapest and most convenient solution unless you are can good with a soldering iron in which case replacing the jack socket is pretty easy if you can get hold of the correct one.Jack sockets are a common point of failure in lots of products. The internal switch metal spring weakens and the contacts no longer make a circuit or they oxidise, again breaking the circuit.