Definition of こたつ虫 (こたつむし)

むし

こたつ虫

こたつむし

kotatsumushi

noun
someone who curls up under a kotatsu all winter, kotatsu bug, kotatsu snail(colloquialism)(pun on かたつむり)
Other readings:
炬燵虫【こたつむし】
Related Kanji
insect, bug, temper
torch, signal fire
foot warmer, (kokuji)