The word "spiking" refers to a sudden increase or rise, often characterized by a significant jump in a particular measurement or statistic. Full definition
The move resulted in sharp spike in value in the Australian dollar, providing a big profit opportunity for nimble traders. (fidelity.com)
This is the kind of spike in insulin you get, but if you take in the exact same amount of sugar, but with some meat added, you get this. (nutritionfacts.org)
Some studies suggest that it can also help control blood sugar spikes in dogs that already have diabetes. (mypetneedsthat.com)