From Japanese-English FreeDict Dictionary ver. 0.1:
笊 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, ざる /zˈäɽɯᵝ/
1. (noun (common) (futsuumeishi))
Note: word usually written using kana alonedraining basket (traditionally made of bamboo), colander, strainer, sieve
2. ざる蕎麦
Note: abbreviation
Note: word usually written using kana alonezaru soba (soba served on a bamboo draining basket with dipping sauce)
3.
Note: colloquialism
Note: word usually written using kana alonestrong drinker, someone who can drink like a fish