i Register
In some senses, muggy is marked as obsolete, slang. Watch for register when choosing this word.
adj
Humid, or hot and humid.
The next was a very unpropitious morning for a journey—muggy, damp, and drizzly.
What struck me as the most curious thing about this wonderful river was: how did the air keep fresh? It was muggy and thick, no doubt, but still not sufficiently so to render it bad or even remarkably unpleasant.
Wet or mouldy.
muggy straw
Drunk.