Here's a breakdown of what that implies:
* Slash: This refers to the lines being shaky, inconsistent in depth, and lacking precision. The artist didn't create clean, defined outlines.
* Pour: This suggests a lack of control over the ink. The ink might be over-saturated in some areas, under-saturated in others, and bleeding out beyond the intended lines.
In short, a "slash and pour" tattoo is a derogatory term for a bad tattoo job. It's not a specific style or technique, but rather a description of the *lack* of skill involved in creating it.