If one is a wuss, they possess a certain level of wussiness. It is the measurement by which someone might determinehow much a panzy a person is, was, or will be.
This is what happens when two gay men who are both bottoms (the ones that like to get fucked - not be the ones who do the fucking - the top) start dating. Their friends will say "what are these two going to do - bump pussies and giggle?"