A sandbagger is someone who
One who sandbags (misleads about his/her ability level in order to win bets)
And sandbagging means
hiding the strength, skill or difficulty of something or someone early in an engagement
with examples from different sports like grappling, racing and poker. The German wikipedia also has an entry saying it derives from boxing and is also used to refer to chess players deliberately keeping a low rating.
I don't know any good German equivalent of sandbagger, though.
- Langenscheidt has no useful entries for either sandbagger ("Segelboot mit Sandsäcken als Ballast" or "Verbrecher, der jemanden mit einem Sandsack niederschlägt") or sandbagging (redirects to sandbag).
- It's mentioned in a discussion on LEO about a Tiefstapler, but the description of Tiefstapler doesn't fit: "Er ist ein angenehmer Tiefstapler, trotz seiner Expertise stellt er die nicht so zur Schau oder gibt an."
- PONS doesn't even know sandbagger, but has an interesting entry on sandbagging: "Sich zurückhalten"
- I looked up Tiefstapler in the Duden ("Untertreibung; Abschwächung, [falsche] Bescheidenheit, Herabspielen, Understatement, Unterbewertung, [vornehme] Zurückhaltung, Zurücknahme") and the DWDS and found die Tiefstapelei. I miss the aspect of hustling a bit (while hustler is too broad).
Is there a German equivalent of sandbagger - someone who makes themselves appear weaker to fool their competitors?