Buttocks and Fag end

Buttocks noun - The part of the body upon which someone sits.

Fag end and buttocks are semantically related In some cases you can use "Fag end" instead a noun "Buttocks".

Fag end noun - An unused or unwanted piece or item typically of small size or value.

Buttocks and fag end are semantically related in part topic. Sometimes you can use "Buttocks" instead a noun phrase "Fag end", if it concerns topics such as tail.