over the hump
over the hump {adj. phr.}, {informal}
Past the most difficult part; past the crisis; out of danger.
Mary was failing math, but she is over the hump now.
John was very sick after his accident, hut he's over the hump.
When Mr. Smith was out of work it looked as if his family would have to go on relief, but they got over the hump.
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Source: A Dictionary of American Idioms