That one flat chested waifu from Konosuba. Her thighs are so thicc that they could emit 5,563N of pressure and squish a bus in mere seconds. Most people either love Megumin, or they don't know her. Most people use the word to describe a hot girl or something that's really thicc.
"Bro... that girl over there really do be lookin like a Megumin..."
"Dude, those girls' legs are about as thicc as Megumin!"
"I'm about to Megu-mixaround yo insides with them Megumin thighs, girl!"