In one of the many tellingly funny moments in “Bad Moms, ” a fitfully hilarious satire of the woes of up-to-the-minute motherhood, Amy ( Mila Kunis) , a working parent of two who feels like she barely has time to breathe, trades barbs with her two new buddies about the escape hatch that each of them fantasizes about. Amy confesses that she’d love to have a quiet breakfast, and adds, with a wistful sense of impossibility, “By myself.” That, for her, would be nirvana. Then Kiki ( Kristen Bell) , a stay-at-home mom with four kids, goes her one better. She talks about her fantasy of being in a car accident, which would then result in a two-week hospital stay, during which she’d have nothing to do but lay around and eat Jell-O and watch bad TV. Kiki has some self-esteem issues ( hence the personal-injury dimension of her escape plan) . Nevertheless, it’s a sign of how close to the bone — and I don’t just mean the funny bone — “Bad Moms” hits that this anecdote provokes major giggles of recognition. A car accident? Why not. Anything to relieve the stressed-out behaviorally correct high-maintenance juggling act that is contemporary motherhood.