Let's break it down:
* Si - If
* mi - I
* ha - do (third person singular, present tense of "hacer")
* eso - that
* es - it is
* un - a
* pecado - sin
Here are some ways to understand the context and intention behind the phrase:
* Expressing guilt or fear: This phrase could be used to express guilt or fear about doing something wrong. For example, someone might say it if they are tempted to cheat or steal.
* Refusing to do something: It could also be a way of refusing to do something that the speaker believes is wrong. For example, someone might say it if they are asked to lie or break a promise.
* Humorous exaggeration: It could even be used humorously to express the speaker's aversion to something that is not actually a sin, but is perceived as undesirable.
It's important to note that the phrase can be used in different ways depending on the context and the speaker's intentions.