hopping
adj. B1 Intermediate US //ˈhɑpɪŋ// UK //hˈɒpɪŋ// hop·ping
adj. very busy and full of energy. You use this to describe a place where many people are moving around and having fun.
adj. characterised by intense activity, excitement, or a high volume of people. Often used predicatively after a linking verb to describe a social atmosphere.
The new club is really hopping tonight.
The downtown area is usually hopping on Friday nights when the local markets and bars are all open.
While the rest of the mall was quiet, the food court was hopping with students celebrating the end of their exams.
Alternative spelling (C17) of hoppe, from Middle French houbelon
Usage
Typically follows a linking verb like 'be' or 'keep'; informal in register.