up to his neck
Also found in: Thesaurus, Idioms.
Related to up to his neck: up to my neck
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|Adj.||1.||up to his neck - deeply involved; "neck-deep in work"; "up to their necks in debt"|
involved - connected by participation or association or use; "we accomplished nothing, simply because of the large number of people involved"; "the problems involved"; "the involved muscles"; "I don't want to get involved"; "everyone involved in the bribery case has been identified"