The phrase "right Charlie" is an informal expression, often used in British English, to refer to someone who has behaved in a silly or foolish manner. It can be used in a light-hearted or mildly teasing way to gently mock someone for their actions or behavior.
For example, if someone does something clumsy or makes a silly mistake, others might jokingly say, "You're a right Charlie!" The intention is not to be harsh or hurtful, but rather to make light of the situation and have a little fun with the person's momentary lapse.
It's worth noting that the phrase might have different connotations or regional variations in usage, but generally, it's used to playfully poke fun at someone's antics or behavior without being overly critical.