"irregular life" is correct and usable in written English.
You can use it to describe any life that is unpredictable or unusual. For example, "After his mother's sudden death, John had to adjust to an irregular life."
Willie's conduct as a writer, while always playful, somewhat belied his image of a chaotic and irregular life.
Later he lamented the "dirty and irregular life" of Indians in the Merced River valley, near Yosemite.
In my early 20s, Siddhartha was a wonderful book to remember if I was feeling glum, because it suggested that an irregular life of adventitious hedonism might be nothing more than another step on the pathway to salvation.
In the "Transactions" of the Medico-Chirurgical Society oforondon for 1847, there is a table that lists, alongside height, weight, age, and other factors, the "attributed proximate cause" of dramatic increases in weight: "copious weak drinks," "marriage," "going to India," "becoming a coachman," "taking mercury for syphilis," "too little to do," and, simply, "irregular life".
A doctor of any decency not only had nothing to say against the use of distilled or fermented beverages; he was himself, nine times out of ten, an appreciative customer of them and argued openly that they sustained him in his arduous and irregular life.
Tragedy brushed up against the house in 1891 when Mr. MacMahon's son and namesake took an overdose of opium after an "irregular life," in which he "spent money with a lavish hand" and "did not seem to take kindly to business pursuits," despite his father's encouragements, The Eagle reported.
Apparently, her first affair was with the celebrated actress Eva Le Gallienne, three years her senior, but although she liked to boast about her irregular love life — "I'm a lesbian," she announced to a stranger at a party.
After working with the company over the holidays to address irregular battery life tests, ranging from an extremely inconsistent 3.75 to to 19.5 hours, the publication has re-run tests to much better effect.
Physicians have an intense and irregular workday life.
Also, I heard that if the spouse has an irregular sex life, he can be infected.
Although she was a generous dolloper-out of food, her eating habits had been, for a large part of her life, irregular and sometimes dangerous.
