1. Something that is extremely out of place or doesnt belong there.
2. Someone who doesn't belong where they insist on being or is making a statement by being there.
3. Someone or thing brave and outspoken and some one or thing who stands his/her/its ground.
Having ham in a cheese shop is very ambiscuous.
Being sexually ambiguous and promiscuous, characterized by switching from gender to gender very quickly. Different from bi-sexual because the ambisucous person will publicly assert that they are first gay, then straight, then gay, and so on.
Person 1 : Katherine hooked up with five girls last night!
Person 2: But she hooked up with that guy on Monday...
Person 1 : Katherine's ambiscuous, remember?