One who searches for discarded winning tickets at a racetrack.(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "stooper" in a sentence
"A man, called a stooper, cashes in unused horse-track tickets."
"In North African culture, men who have sex with men are very common - but being the 'stooper' rather than the 'stabber' has negative social connotations."
"Traced to the Medieval German höker, it translates as a "stooper" or "one stooping under a pack.""