Like it’s going out of fashion
Definition 1 of 1
Pro Tip 1/3Hyperbolic Expression
This phrase exaggerates a high level of activity for dramatic effect. 
She's buying clothes like it's going out of fashion.
Pro Tip 2/3Often Temporary
Used to imply the behavior is not sustainable long-term. 
He's playing video games like it's going out of fashion.
Pro Tip 3/3Not Literal
Doesn't mean the activity will actually become unfashionable, but suggests urgency or frenzy. 
They're using up their phone data like it's going out of fashion.