hum·ding·er 
/ˈhʌmˈdɪŋɚ/ noun
plural hum·ding·ers /ˈhʌmˈdɪŋɚ/ noun [count] informal : something that is very impressive or exciting
▪ The last storm was a real humdinger! ▪ I hear we're in for another humdinger of a storm!
▪ The last storm was a real humdinger! ▪ I hear we're in for another humdinger of a storm!
