Chancre

[Sarah]

A painless ulcer, particularly one that develops on the genitals in venereal disease.

[Lizzy Liz]

[sores] caused by [syphilis] ([Sexually Transmitted Disease])...generally quite skanky...

[Michiko]

adjective: someone who is like a [pestering] disease; a person who always [nags] you and wont go away; someone who is so disgusting and repulsive that you would compare them to an [STI]
often used in a derogatory way towards someone who is acting like a tool.