"Mental fogginess" refers to a state where your mind feels unclear, confused, or unfocused, making it difficult to think or remember things clearly. Full definition
Shortly thereafter, a state of mental fogginess ensues as even the brain runs low on energy sources. (blog.bridgeathletic.com)
1 teaspoon moon dust of choice: Action Dust to soothe overworked muscles, Beauty Dust for a glowy complexion and healthy hair, Brain Dust to combat mental fogginess, Goodnight Dust when sleep has been evasive, Sex Dust, for, you know, and Spirit Dust to get that extrasensory perception going. (goop.com)
Brenda had all the telltale hypothyroidism signs, including mental fogginess, fatigue, muscle pain, feeling cold, and unexplainable weight gain. (mindbodygreen.com)