おひれ
tail and fins; embellishment (of a story, rumor, etc.); exaggeration
Also written 尾鰭、尾ヒレ
Noun
「学園がくえんの廊下ろうかで、濃厚のうこうなキスシーン・・・聞きいたぞ聞きいたぞ」「濃厚のうこうじゃなーい!話はなしに尾おひれ付ついてるって・・・」
"A passionate kiss scene in a school corridor ... I've heard all about it!" "It wasn't passionate! That's an exaggeration..."