in deep

Idioms  

1. Seriously involved; far advanced. For example, He was in deep with the other merchants and couldn't strike out on his own , or She used her credit cards for everything, and before long she was in deep .

2. in deep water . Also, in over one's head . In trouble, with more difficulties than one can manage, as in The business was in deep water after the president resigned , or I'm afraid Bill got in over his head . These metaphoric expressions transfer the difficulties of being submerged to other problems. The first appears in Miles Coverdale's 1535 translation of the Book of Psalms (68:13): “I am come into deep waters.” The second, which also can signify being involved with more than one can understand, dates from the 1600s. Also see over one's head .

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Example Sentences

It appears to be in deep trouble.

From BBC

Several French farming sectors are in deep crisis, from wine-growers hit by falling consumption to poultry farmers hit by avian flu.

From BBC

But while the two shared a long history, he says Sangha never hinted that she was in deep water.

From BBC

The Behn campaign also was canvassing in deep red Williamson County, a prosperous jurisdiction which has become the bedrock of the modern Republican Party.

From Slate

He returned to power in a country that is in deep crisis, with a severe shortage of fuel and foreign currency.

From BBC