Why do you need to slice something? We required to slice food like meat, vegetables, fruit, and other foods. A dream seeing oneself slice something can mean you are cutting the thing down to manageable size. Relating this dream’s meaning to real life, it means you should be cutting down your work into smaller portions.
A slice with a sharp instrument usually carries a warning, in a dream. It could hint that in real life, someone is trying to harm you. A sharp tool is a metaphor that carries potency. It usually means risk and danger.
On the other side of this argument, it can also mean you or the opposite party, is trying to slice away the connection. Maybe someone does not want to associate with you anymore. Maybe your weak bond is being sliced away. A cut may not be clean and may injure either party. If you think that a sliced breakaway is going to happen, prepare yourself mentally and emotionally for it.