jack squatn.
/ˌdʒak ˈskwɒt/, /ˈdʒak ˌskwɒt/, U.S. /ˈˌdʒæk ˈskwɑt/ slang (originally and chiefly U.S.).
Nothing at all; (in negative constructions) anything at all. Cf. jack-all n., jackshit n.
ΘΚΠ
the world > existence and causation > existence > non-existence > [noun] > nothing > nothing at all
noughtOE
neither tip nor toe1610
nix1781
damn the haet1787
no nothing1815
zero1823
all1842
neither hide nor hair1857
zip1900
nixie1906
damn all1910
fuck-all1916
Fanny Adams1919
bugger-all1921
S.F.A.1933
not a sausage1938
shit1949
zilch1956
eff-all1958
sod all1958
diddly-squat1963
diddly1964
jack-all1965
niente1969
zippo1973
feck-all1975
hee-haw1975
naff all1977
jack squat1986
the world > relative properties > kind or sort > generality > [noun] > state of being non-specific > unspecified thing(s) > anything > anything at all
whatsoever1579
whatever1637
quicquidlibet1647
whatsomever1648
jack-all1965
jack squat1986
1986 W. Ehrhart Marking Time xiv. 72 I don't want to hear any more about reputations, ladies; they don't mean jack squat.
1991 Leader-Times (Kittanning, Pa.) 4 Feb. 1/5 A red light will control the traffic... Those blinker lights aren't going to do jack squat.
1997 Capital Times (Madison, Wisconsin) 19 Dec. 1/1 You're going to wake up Christmas morning..and find your stocking full of jack squat!
2007 Washington Post 29 July (Home ed.) d3/4 All my protests amounted to jack-squat.
2016 Daily Business Alerts (Austral.) (Nexis) 31 Aug. The people you are presenting to can't decide jack squat.
This entry has been updated (OED Third Edition, March 2018; most recently modified version published online March 2022).
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n.1986