A flea market is like a big secondhand-goods bazaar.
Tips
usage
Almost always seen in compounds: 跳蚤 (tiàozǎo, flea — the everyday word), 跳蚤市场 (flea market). The single-character 蚤 is bookish on its own.
history
In Classical Chinese 蚤 was sometimes a phonetic loan for 早 (zǎo, 'early') — a usage you'll meet in texts like 《史记》 and 《诗经》. Modern Mandarin keeps the meanings strictly separate.
