Scum and Seminal fluid

Scum noun - People looked down upon as ignorant and of the lowest class.

Seminal fluid and scum are semantically related. In some cases you can use "Seminal fluid" instead a noun "Scum".

Seminal fluid noun - The thick white fluid containing spermatozoa that is ejaculated by the male genital tract.

Scum and seminal fluid are semantically related. Sometimes you can use "Scum" instead a noun phrase "Seminal fluid".