In recent years, there has been a growth of literature examining the mental health impacts of microaggressions, which are defined as subtle forms of discrimination toward oppressed groups. The current study utilized a qualitative focus group method and directed content analysis to categorize several types of sexual orientation microaggressions that exist. Eight themes were identified, including "Use of heterosexist terminology" and "Endorsement of heteronormative culture/behaviors." Results suggest that lesbian, gay, and bisexual (LGB) individuals experience both conscious and unconscious microaggressions from heterosexuals and support that microaggressions negatively impact LGB individual's mental health. Implications for youth development are discussed.