lesbro

noun2

1. •
   (slang) A male friend or companion of a lesbian.

   • Isaac, a 20-year-old gay male who lives with a lesbian and her bi-sexual girlfriend, did not realize he was a "lesbro" until he moved in with these two women. — 2008
2. •
   (slang, offensive) A man who is sycophantic or groveling to lesbians and/or bisexual women.