麻麻说我是捡来的

The name implies a lighthearted or joking acceptance of what the mother (ma ma, which means 'mom' in Chinese) might teasingly say—that she is adopted rather than birthed. The user might be hinting that they are unconventional, open-hearted, and not too bound by traditional concepts of family. It’s common in casual talk between parents and children, especially when parents affectionately jest with their kids. Here it shows the playful aspect of the user’s personality