noun
squeezing; hugging tightly
Onomatopoeic word for the sound or sensation of squeezing something or hugging someone firmly, often with affection or playful force.
子どもがぬいぐるみをムギュウと抱きしめた。
The child hugged the stuffed animal tightly with a 'mugyuu'.
パンがムギュウとつぶれてしまった。
The bread got squished with a 'mugyuu'.