Which expression would typically indicate that someone is in disbelief or disagreement?

The expression "Not a Dickons" is an indicator of disbelief or disagreement because it carries a colloquial tone that suggests skepticism or rejection of what has been stated or suggested. It reflects a strong emotional response, often implying that the speaker finds the previous statement hard to believe or not worthy of acceptance. In this context, "Dickons" could reflect an idea, statement, or situation that the speaker finds unreasonable or unbelievable.

The other expressions, while they may convey various sentiments or responses in conversation, do not carry the same clear implication of disbelief or disagreement. For instance, "You mama nehwa teach you say 'hi' ah wha?" may be more playful or rhetorical, while "Looky yah" generally points to attention or showcasing something without directly challenging it. "Goo bade ya stink skin," although expressive, is more likely to denote insult or annoyance rather than outright disbelief.