Green’s Dictionary of Slang

scum n.

[SE scum, a dirty film/foam]

[1940s+] (US) semen.

Terms of abuse based on SE and refs. to semen

In compounds

scumbag (n.) [SE bag; but note bag n.1 (1a)] [1950s+] (orig. US)

1. a contraceptive sheath.

2. (also joe scumbag, scum wad) a term of general abuse.

scumbag (adj.)

[1970s+] repellent, disgusting, despicable.

scumball (n.) [-ball sfx]

[1980s+] (US) an unpleasant person.

scumball (adj.)

[1980s+] disgusting, repellent.

scumbelly (n.)

[1990s+] (US) a term of abuse.

scumbucket (n.) [1980s+] (US)

1. an unpleasant person.

2. an unpleasant, dirty place.

scumbucket (adj.)

[1980s+] (US) unpleasant, disgusting.

scumdog (n.)

[1990s+] (US) a term of abuse.

scumdog (adj.)

[1990s+] (US) unpleasant, disgusting.

scum fuck (n.) (also scumfucker)

[1980s+] a general term of abuse.

scumhole (n.)

[1990s] the anus.

scumpig (n.)

[1990s+] a general term of derision, abuse; sometimes used affectionately.

scumsucker (n.) [1960s+] (orig. US)

1. a person who performs fellatio.

2. (also scumsnorter) a derog. term of general abuse.

scumsucking (adj.)

[1960s+] a derog. epithet.

In phrases

baththub scum (n.)

[1980s+] (US campus) an unpleasant person.

male scum (n.)

[1990s+] (US campus) a man who treats women badly.

shower scum (n.) (also pond scum)(US campus)

1. [1980s+] a highly unpleasant person.

2. attrib. use of sense 1.