“here is a third type of affix, not normally used in English, but found in some other languages. This is called an infix and, as the term suggests, it is an affix that is incorporated inside another word. It is possible to see the general principle at work in certain expressions, occasionally used in fortuitous or aggravating circumstances by emotionally aroused English speakers: Hallebloodylujah! , Absogoddamlutely! and Unfuckinbelievable!. In the film Wish You Were Here, the main character expresses her aggravation (at another character who keeps trying to contact her) by screaming Tell him I've gone to Singabloodypore!. The expletive may even have an infixed element, as in godtripledammit!.
(Excerpt from: George Yule. “The Study Of Language.” iBooks.)
I am wondering what the bold part means. Would you help me understand it?