Search Result：up to his neck
up to his neck 
(TTS Sound)
(TTS Sound)Overview of adj up_to_his_neck
The adj up to his neck has 1 sense
- neck-deep, up to my neck, up to your neck, up to her neck, up to his neck, up to our necks, up to their necks -- (deeply involved; "neck-deep in work"; "up to their necks in debt")