I. hash 1 /hæʃ/ BrE AmE noun
[ Sense 1,3: Date: 1600-1700 ; Origin: ⇨ ↑ hash 2 ]
[ Sense 2: Date: 1900-2000 ; Origin: hashish ]
[ Sense 4: Date: 1900-2000 ; Origin: Probably from hatching ]
1 . make a hash of something informal to do something very badly:
I made a real hash of my exams.
2 . [uncountable] informal ↑ hashish
3 . [uncountable and countable] a dish made with cooked meat and potatoes:
corned beef hash
4 . [uncountable and countable] British English the symbol #
II. hash 2 BrE AmE verb
[ Date: 1500-1600 ; Language: French ; Origin: hacher 'to cut up' , from hache ; ⇨ ↑ hatchet \]
hash something ↔ out phrasal verb American English informal
to discuss something very thoroughly and carefully, especially until you reach an agreement:
The reorganization plan was hashed out September 16.