A bull is a man who engages in sex with a woman whose partner enjoys the cuckold (cuck) dynamic.  The partner normally watches with enjoyment.

A brat is a person who likes to exhibit one or more of the following behaviors as part of their kinky role: teasing, playful, sneaky, mischievous, stubborn, rebellious, disrespectful or disobedient.  A brat’s behavior may be a component of their power exchange relationship.

A bottom is a person who is attracted romantically and/or sexually to another gender as well as their own.  It is a frequently used term in gay porn.

A bisexual is a person who is attracted romantically and/or sexually to another gender as well as their own.

A big is a person who is nurturing and/or parental in a relationship dynamic.  This is often related to sexual kinks and kinky relationships.

A babygirl is a kink where a person seeks a parental and/or nurturing figure in a relationship.  They enjoy identifying as or role-playing as a young girl.  This term is also used as a term of endearment for a female-identified submissive.

A babyboy is a kink where a person seeks a parental and/or nurturing figure in a relationship.  They enjoy identifying as or role-playing as a young boy.  This term is also used as a term of endearment for a male-identified submissive.

An asexual person is an individual who has low or absent sexual interest. They have no desire for people of any gender.

An ageplayer is a person who engages in a specific type of role-playing.  In this particular case of role-playing, a different age is taken on by one or more of the participants.