Other forms: boomlets
A boomlet happens when business, popularity, or activity picks up for a short time. A lemonade stand might experience a boomlet when a family of 12 suddenly stops by, purchases a glass each, and leaves again.
You may recognize the suffix -let on the word boomlet. Adding -let indicates that something is a small version of something — in this case, a small boom. A boom can be a time of economic prosperity or a run of good luck. A boomlet is a brief, limited time of economic prosperity or good fortune, like an uptick in business that is short-lived. Some other words that use the -let suffix are booklet, "a small book"; droplet, "a small drop"; and piglet, "a small pig."