What does it mean when someone says its nothing personal?
(This is) not based on emotions, subjective motivations, or personal biases; (this is) not meant to offend you; (this is) not a personal slight against you. Though it can be truthful, this phrase often tends to be sarcastic, insincere, or unconvincing in usage or reception.
What does it mean if someone is just?
Just means "fair." When something is morally and ethically sound, it's just. If you are a just teacher, you won't give your student an F just because his mother is rude to you. Just might remind you of the word justice.
What does it mean when someone says here goes nothing?
Definition of here goes nothing chiefly US, informal. —used when one is about to try doing something new, difficult, or unpleasantI've never skied before, so here goes nothing.