Used as a very simple scale:
Fuck Monkey or Sex Pixie.
Fuck Monkey: Usually in their late teens or early twenties, F.A.B. (firm and bendy).
Sex Pixie: As above, but not as obvious in their intent.
2. Person prone to "fucking up" on a regular basis.
3. Person who lacks basic motor skills, smells like urine and fesses and always breaths with their mouths open.