Equivalent of <i>also</i>. Used primarily in stating facts or arguments, especially in a list.
The two-party political system is too moderate and easily corruptable. Pluswhich, many issues shouldn't even be brought up before anyone in government.
She ambushed me! I was totally not expecting her to be there, pluswhich I was in a hurry and it was just annoying having to put up with that b***h when I was supposed to be elsewhere!