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- (in) up to (one's) elbows
(in) up to (one's) elbows
(in) up to (one's) elbows
Extremely busy; deeply involved or engrossed (in or with something). I'd love to come for a pint, but I'm in up to my elbows with work for my class on Monday. John has been up to his elbows with the kids lately.