Definition of shtook noun from the Oxford Advanced Learner's Dictionary

 

shtook

 noun
(also schtuck)noun
BrE BrE//ʃtʊk//
 
; NAmE NAmE//ʃtʊk//
 
[uncountable]
 
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Word Origin 1930s: of unknown origin.Idioms
be in shtook
 
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(British English, informal) to be in serious trouble