Emotivism is a meta-ethical theory which states that moral claims are not statements off fact, but rather, expressions of a particular kind of emotional approval or disapproval about certain actions, with the intentions of making other people share those feelings. For example, if someone were to state "murder is wrong," under emotivism, this would be considered identical to if they had simply said "murder!" in a disproving tone of voice. Under emotivism therefor, there are no "moral facts" outside the feelings of certain individuals.
Relationships
Friends:
Moralism - Do the right thing because I feel like it.
Frenemies:
Feelism - I don't think that all judgments should be based on feelings, just moral ones.
Enemies:
Kantianism - He really hates me.