"bearboxxx" is a term referring to a specific type of adult film or content. It appears to be a combination of two words: 'Bear' and 'Boxxx'. The term 'Bear' in the context of pornography generally refers to a particular type of gay male pornography that features hairy, overweight, older, or beard-wearing men. These individuals often identify as "bears" within the LGBTQ+ community.
On the other hand, 'Boxxx' could potentially be related to the term 'box', suggesting a focus on male genitals (a box). It might also refer to the production company or series named Boxxx. Therefore, "bearboxxx" would refer to content involving hairy, older men with an emphasis on their genitals and often produced by or associated with the Boxxx series/company.