'Muggier' definitions:

Definition of 'Muggier'

From: GCIDE

Muggy \Mug"gy\ (m[u^]g"g[y^]), a. [Compar. Muggier (m[u^]g"g[i^]*[~e]r); superl. Muggiest.] [Cf. Icel. mugga mist, mugginess. Cf. 4th Mold.]
1. Moist; damp; moldy; as, muggy straw. [1913 Webster]
2. Warm, damp, and windless; uncomfortably hot and humid; sultry; as, muggy air, weather. [1913 Webster]