I've notice recently my partner's orgasms have been bigger and more powerful and there's more 'fluids' coming out too! ;) What could that mean though?

Orgasms can be accompanied by female ejaculation. Not an unusual occurrence and absolutely nothing to do with urine. This usually happens when the g spot has been especially well stimulated.

Oh! I am a girl.. I was just concerned for my guy.. Thanks anyway.. by the way are you a guy or gal?

There is nothing wrong with that. It happens from time to time.