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.
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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Deep, situational, and emotional jokes based on what is relevant and has a POINT!
The lascivious sex predator is out; the deep-pocketed caped crusader is most definitely in.Sleazy Billionaire’s Double Life Featured Beach Parties With Stephen Hawking|M.L. Nestel|January 8, 2015|DAILY BEAST
Fumbleroooohski…'” (39) “'Look at me, ungh, splitting my own seam, oohh… going deep.‘A Gronking to Remember’ Speed Read: 8 Naughtiest Bits|Emily Shire|January 7, 2015|DAILY BEAST
There was deep brown flesh, and bronze flesh, and pallid white flesh, and flesh turned red from the hot sun.Powerful Congressman Writes About ‘Fleshy Breasts’|Asawin Suebsaeng|January 7, 2015|DAILY BEAST
As he drove me back to the logging road, Frank told me about the area in his deep voice.The 7-Year-Old Plane Crash Survivor’s Brutal Journey Through the Woods|James Higdon|January 7, 2015|DAILY BEAST
He remembered something—the cherished pose of being a man plunged fathoms-deep in business.St. Martin's Summer|Rafael Sabatini
At present, Louis was too self-absorbed by the struggles within him, to look deep into what was passing around him.
It succeeds best in a deep rich loam in a climate ranging from forty to fifty degrees of latitude.
And then what could be more deep and poetic than Liszt's transcriptions of Schubert's and Wagner's songs?Music-Study in Germany|Amy Fay
The next moment a pistol was fired at their head, and a deep groan shewed it had taken too true an aim.