(in) up to (one's) eye(ball)s(redirected from up to their eyes)
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(in) up to (one's) eye(ball)s
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 eyeballs with work for my class on Monday. John has been up to his eyes with the kids lately.
See also: up