When a guy is going down on a girl and she clamps her chubby thighs together,squeezing his head and sealing his ears off leaving him virtually deaf,temporarily.
The gratuitous act of using one's thighs as ear muffs, for a lover or friend, while offering at the same time the vagina as an effective eye mask.
Thighmuffing was in order when Meredith forgot her ear plugs, Kelly obliged by wrapping her inner thighs over Meredith's ears and assertively pressing her warm vagina over Meredith's eyes as a soothing sleep mask.