An inbetween between bisexual and straight. A person who is mainly straight but does sometimes find the same gender appealing. Most of them could imagine having a homosexual relationship, but they mainly have heterosexual relationships.

the whale tail is the shape formed when a g-string rides up high over a womans trousers

I'm straight but shit happens

Not gay or bisexual, but in between bi and straight. Like, being straight, but you would consider doing something with a member of the same gender should the situation arise. Mainly for pleasure and adventurous reasons, you probably wouldn't date them. Also can be called bent.
It DOESNT mean gay as some people would say it does.

A primarily straight individual who, in certain situations can find persons of the same sex appealing.

A primarily straight human being who occasionally enjoys sexual engagement with the same sex with only playfulness in mind. No future commitment or expectations involved. i.e. Drunk and horny.

A person who identifies as a heterosexual, but is not afraid to explore curiosity towards the same sex.