No, picking it up on the street is not an explanation of how you found $20 while walking home from the metro station. This time we're talking about lessons learned outside of the classroom or through books. It is learned from real life experiences out in the real world.
Another meaning for picking it up on the street is when children learn things from their friends or acquaintances instead of from their parents or teachers. This information is usually wrong. Very often this applies to sex-education. Parents and teachers want to teach children the truth or the best way to handle it before they pick it up on the street.
Do you have a question? Suggestion? Feel free to leave a comment. See you tomorrow!