Nofooling is a term that, typically, implies sincerity or seriousness. While there may not be a direct antonym for this particular phrase, there are several terms that could be considered as opposites in different contexts. For example, if we look at the opposite of sincerity, we might consider insincerity or dishonesty. Similarly, if we look at the opposite of seriousness, we might consider lightheartedness, playfulness, or even frivolity. Depending on the context in which nofooling is being used, any one of these terms might be considered an antonym. Ultimately, the choice of antonym will depend on the specific connotations and implications of the original word.