Said by gay people in hopes that someone (usually unattractive or unpleasant) is not gay, to avoid bringing down the general reputation of gay men/ lesbians. Can also be "my team" to a non-queer audience, or "our team" to a queer audience.
The reverse works too "I hope she's on our team- Jodi's so hot."
"I *hope* he's not on my team, even though he keeps referring to his 'partner'. Joe is SO obnoxious."