1. [16C+] a cunning, sly individual, esp. a gambler or swindler [20C+ use is derog.].
2. [late 16C+] unintelligible language, esp. cant or sl.; esp. in phr. it’s all Greek to me, suggesting that something is incomprehensible; occas. of actions or ideas.
3. a genteel beggar.
4. [19C+] a derog. term for an Irish immigrant to the US or UK; cite 1880 is not derog.
5. [mid-19C] a newcomer.
6. [1930s+] (US campus, also Greek freak) a member of a college fraternity or sorority; thus as adj. [the use of Greek letters as the names of such societies].
7. [1930s+] a person who engages in anal intercourse, not necessarily but usu. a homosexual [the stereotyped identification of Greeks with homosexuality].
8. [1930s+] (also G) anal intercourse; often used on a prostitute’s ‘bill of sale’.
[1910s+] a phr. meaning ‘forgive my coarse language’.
[1970s+] (US campus) to join a college fraternity or sorority.