To be used ina derogatory manner toward a person of Italian descent. The intent is to liken the person to a pasta, which I can only assume is both Italy's national dish and president.
Where one party believes the interaction is platonic, while the other covets more.
Although Jane believes that she and John are just really good friends, it's actually a fauxtonic relationship, as John appears to be waiting for her to see him as boyfriend material.