In English, if someone has already met someone else but later forgets their name, they might ask them something like, "I'm sorry, what was your name again?" (which is less forceful than a blunt "What ...
In English, there is a phrase "They don't call me ... for nothing." (showing that some nickname someone has has been confirmed by something they just did or are about to do). Is there any equivalent ...
In English these names are used as a substitute for the average guy. Or as a specimen when filling out a passport form. What names/expressions are used in Spanish for this purpose?