Noun
(idiomatic) A feeling of invigoration and restlessness associated with the arrival of the warm weather and renewal of nature in the spring season.
(idiomatic) A feeling of laziness or listlessness associated with the arrival of the warm, comfortable weather of the spring season.
(obsolete, Australia) Scurvy.
Source: en.wiktionary.orgIt's spring fever. That is what the name of it is. And when you've got it, you want-oh, you don't quite know what it is you do want, but it just fairly makes your heart ache, you want it so! Mark Twain
Now that spring is in the air and spring fever is setting in, it’s time to shed those layers, pack up the snow boots and switch out all your black ensembles for bold, bright colors that are light, flowy and fabulous. Source: Internet
It’s the sure cure for your tastebuds’ spring fever. Source: Internet