Headphone Jack

There is a little washer that came off when I pulled my headphones out perhaps too abrubtly, now I can't listen to music because I can't stand the low quality laptop speakers. Is there a way of converting the hole where u plug in the microphone into a headphone hole? (is this hole called a jack? or is the jack the 'male' part?)

I have a warrantee but I lost the receipt so I don't think I can claim it.

>>2
Why would you do that when you can get Bluetooth headphones.