"mabs" is an acronym for Mid Afternoon Butt Sweats. The mabs is that moist, slightly unpleasant feeling in your underwear on a warm day or after some physical activity.
"mabs" is frequently preceeded by "the" ("the mabs").
That brisk walk gave me the mabs.
I know it's still morning, but I've got the mabs.
Mab is the queen of the faeries in Shakespeare's Romeo & Juliette. Girls who are named Mab are beautiful, clever, unique and usually very artistic. Also, one of Uranus' moons is named Mab, and was discovered in 2003.