Bipartisan (n) or bipartisanship (adj). Noun or adjective. Generally perceived as a "good thing" or at least the pol using the word hopes that is what the voters perceive. At it's strongest, bipartisan is a code word meaning vote for my bill. A weaker form of the word means I will talk compromise with my political opponents rather that just yelling at them.
If a pol has nothing better to offer than bipartisanship, you ought to vote for the other guy.