Definition of jack-all in English:
jack-all
noun
slangNothing at all; (in negative constructions) anything at all; the least thing. Compare "jackshit", jack squat .
Pronunciation
jack-all
/ˌdʒakˈɔːl/ /ˈdʒakˌɔːl/Origin
1960s; earliest use found in Alan Sillitoe (1928–2010), novelist. From Jack + all [noun].
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