ミ
　
ミ
　
ズ
せん
千
びき
匹

noun

Vulgar expression or word, slang.
  1. thousand earthworms (as a description for a vagina that has many folds and provides extraordinary pleasure during intercourse).

Variations

Pronunciation Kanji Kana Is Common
　
ミ
　
ミ
　
ズ
せん
千
びき
匹
 ミミズ千匹 ミミズせんびき
　
ミ
　
ミ
　
ズ
せん
１０００
びき
匹
 ミミズ１０００匹 ミミズせんびき

Contained Kanji Breakdown

thousand
セン　ち　かず (1st, N5)
equal, head, counter for small animals
ひき　ヒツ (7th, N2)
hiding enclosure radical (no. 23)
ケイ (Kentei 1)
legs radical (no. 10)
ジン　ニン　がい (Kentei 1)