go in off the deep end


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go in off the deep end

1. To become crazy or irrational. (An allusion to the area of a swimming pool where the water is the deepest, and thus the most dangerous.) Primarily heard in US. A; "Now your father thinks the neighbors are plotting against him." B: "Wow, he's really gone in off the deep end!"
2. To become extremely or uncontrollably angry. Primarily heard in US. Whoa, man, stop yelling! I only put a tiny scratch on your car, so there's no need to go in off the deep end.
3. To become carried away (with an action or idea) in a reckless, irresponsible, or inappropriate manner. Primarily heard in US. I thought Karen just wanted to do some minor renovations around the house, but she's really going in off the deep end with it!
See also: deep, end, go, off
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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