Definition
Adjective (and sometimes noun) for a person—especially a man—attracted to the same gender; also used as a derogatory slang for “uncool” or “lame” (offensive and dated).
Examples
"He came out as gay in college, and his family was supportive."
"Many gays and lesbians campaigned for marriage equality."
"He said, “That’s so gay,” using the term offensively to mean “uncool”—a dated and hurtful usage."