A complete loon-ball. A crazy person. Nut-Job.

Someone who needs to be taken out (whacked) for stupidity. A job waiting to happen that saves humanity from genetic disorder.

when a group of 2 or more men mutually masturbate one another

To kill somebody as part of a financed murder contract. hit

Where a girl beats your penis back and forth to give you an orgasm. It is somewhat similar to a handjob.

With a "job", there is always someone else involved or else payment would not really be payment, would it? Similarly, the suffix-like term "job" added to anything implies that someone else is involved, eg. head job, rim job, hand job (No, not JUST because one can not reach on their own). Masturbating ones self should not be referred to as a whack JOB.

There are a number of definitions to this phrase, two of the commonest being:
1) Someone whose behaviour does not conform to society’s norms. It can be applied to a broad range of people, from those who are slightly eccentric to others who have completely lost touch with reality and need psychiatric help. The phrase can even be qualified to show the degree to which the person is affected. If the person was only mildly eccentric, they would be described as 'a bit of a whack job', if the behaviour was rather more weird then they might be described as 'a proper whack job'. If the person was seriously insane then they would be 'a total, out-and-out, raving whack job'.
2) A professional killing, also known as a hit. The whack part comes from the victim being killed (whacked), the job from the fact that this is done for payment by a professional (it's his or her job).

There are a number of definitions to this phrase, two of the commonest being:

1) A person who exhibits abnormal behaviour, this can vary from mild eccentricity to full-blown, froth at the mouth insanity. The degree to which the person is a whack job is usually given by qualifiers to the phrase. Mild eccentricity would be indicated by saying the person was 'a bit of a whack job' stronger symptoms of eccentricity and the person would be 'a proper whack job'. If the person was seriously insane then they would be 'a total, out-and-out, raving whack job'.

2) A professional killing, also known as a hit. The whack part comes from the victim being killed (whacked), the job from the fact that this is done for payment by a professional (it's his or her job).

A crazy person