A "flash sale" is a limited-time offer where something is sold at a discounted price. It usually lasts for a very short period, often only a few hours or days. Full definition
Today I'm announcing a 24 - hour flash sale on my video class bundle! (lactationlink.com)
Not saying all are bad but most of them I've never heard of or are games that have been in flash sales for a $ 1 or $ 2 at some point. (blog.us.playstation.com)
Only White color variant will be available in first flash sale. (maktechblog.com)