This veteran gambler has already lost all his savings.
Tips
usage
Distinguish: 赌客 = a person who gambles at a venue (a 'punter' or 'patron'); 赌徒 (dǔtú) = a chronic / addicted gambler with a more pejorative tone. 赌客 is the more neutral, business-side term — casinos refer to their customers as 赌客.
memory
赌 (gamble) + 客 (guest / customer) — 'gambling customer'. The same -客 ending appears in 顾客 (customer), 游客 (tourist), 黑客 (hacker).