If you are trading in a currency pair then swap is simply the interest rate between the two currencies of such pair. Swap is the interest which is sometimes paid to you and sometimes it is paid by you. This depends upon your position in the market. If your position in forex market is for a long time then interest is given to you and if your position is for short time then this interest is cut from your account.
was hoping to see something new, well i guess there is non, lol. but yeah, we deal with swaps. atleast try to understand where it comes from and to where it goes