I'm not entirely sure what 'hard pipe hittin pulp fiction' specifically means. 'Pulp fiction' has a definite meaning in the literary world. However, 'hard pipe hittin' might be a very local or even a made - up expression by someone. It could be some kind of action that occurs within a story that has the feel of pulp fiction, like something forcefully hitting a hard pipe in a gritty, violent pulp - style scenario.
It's not a common phrase. 'Pulp fiction' is a well - known term referring to inexpensive fiction magazines and novels from the early 20th century, often with lurid or sensational content. But 'hard pipe hittin' is rather unclear. It could potentially be some sort of very informal or made - up description perhaps related to something hitting a hard pipe in the context of a pulp - like, rough - and - tumble story, but that's just speculation.