As nouns the difference between cumskin and cuskin
is that cumskin is a white person while cuskin is a kind of drinking cup.
cumskin
English
Noun
(
en noun)
(slang, derogatory, offensive, ethnic slur) A white person.
References
* Usenet newsgroups: [http://groups.google.co.uk/groups/search?q=%22cumskins%22&btnG=Search&sitesearch=groups.google.com]