Taken from the tales of King Aurther and his knight, Percival, this refers to a person or couple who is searching for the "holy grail", the "unicorn", the HBB.

Percival did locate the Grail at one time, but, being too immature and failing to ask the proper question, he failed in attaining the Grail and he must grow spiritually and mentally before he could locate it again.

Percival is described in some places as "the least worldly and the least groomed of all the knights", having been raised in the woods away from society, and "extremely pious but somewhat naive".

This is analogous to a couple who is new to polyamory and, lacking sufficient role models in alternative relationships and lacking the experience themselves to understand the complex nature of multi-partner relationships, the couple believes, rather naively, that the way to circumvent jealousy, possession, or feeling "left out", is to find one person to share equally.

The rationale is that one partner cannot get jealous if he or she gets to do all the same things at the same time with the new partner as the existing partner. This does not refer to triads that just happen to spring up because the relationship between all involved was most compatible in a triad relationship. This is specifically for existing dyads

Colloquial; Synonym for hot bi babe or HBB, often derogatory, condescending, or ironic. A bisexual person, usually though not always female, who is willing to join an existing couple, often with the presumption that this person will date and become sexually involved with both members of that couple, and not demand anything or do anything which might cause problems or inconvenience to that couple.

The term is often used to be dismissive of a couple seen to be only superficially polyamorous. Because of the demands that this type of couple places on the woman (that she be single and not take on any additional partners, and become involved with both members of the couple equally, and often "complete" their family as a surrogate mother and housekeeper and/or breadwinner and not do anything that may threaten or disrupt the existing couple), many in the poly community call this type of woman a "unicorn", as in mythical and not likely to be found, even though there are plenty of bipoly women around.

Sometimes the unicorn is expected to not develop any emotional attachment and is strictly there for a sexual relationship (equally distributed to both members of the dyad) and/or is prescripted as a secondary. This term is used as a reminder th...

Derogatory. An individual or couple seeking a unicorn or HBB. Different from a person who is merely attracted to bisexual poly people. Refers to someone who is seeking "that special third to complete" their family. They often believe a bisexual third partner will prevent jealous feelings on the part of either of the original members of the dyad because of the mistaken assumption that one will not get jealous if one gets to do all the same things as the other and no one ever experiences anything apart from the other half of the primary couple.

This type of couple expects their hypothetical future partner to be single or willing to give up any existing and future partners, to love & have sex with both members of the original dyad equally, and for each member of the existing dyad to reciprocate exactly an equal level of love and sexual attraction for the new person.

This type of couple will not consider any kind of relationship with a male, with someone who is only sexually attracted to one of the original dyad members, with someone who is already partnered, & usually promises to break up with the new person for the sake of "protecting" the existing dyad, leaving the unfortunate third partner feeling disposable. Sometimes the unicorn is expected to not develop any emo...

Hot Bi Babe. Sexually-available, promiscuous, attractive, bisexual woman. Much sought after by male HNGs (sometimes in concert with the man's female partner) who fervently hope that said HBB will help fulfil their long-held fantasies of having sex with two women at the same time.

Ironic, if used self-referentially.

Also ironic if applied to a bi man.

Someone who pretends they're bisexual to create a scene or uses the fact that they're bisexual to create a scene.

Some qualities of a bi-scene kid:
-Thinks the only reason others dislike them is because they are bi.
-Constantly talks about how they are bi or brings up their same-sex partner when joking about sex. However, they won't do this when they are dating someone of the opposite sex.
-Will say things to remind you that they are bi.

a very sexy person with a nice bod

noun \'bi-gē frīz\

a. A incredibly attractive voluptuous woman.

b. A term of endearment for your closest friend, homeboy, wingman, accomplice, etc ...