How long does it take for illegal weed to exit your system?

As with every other illegal/illicit drug:

• 24-48 hours to clear blood.
• 2 weeks to 30 days to clear urine and fat deposits.
• up to six months to clear hair (actually it remains as long as that portion of your hair remains, however is legally testable for only six months).

That this is not the information you wanted to hear is without question. Facts are facts however. By the way, all marijuana is illegal under federal statute.

The simple fact is that if you face drug testing on a regular or random basis, the surest way to avoid a positive result is to avoid using. Additionally, there is no rapid means of cleansing your system. You can hasten metabolism some by exercise and hydration, however you are still a slave to your own personal metabolic rate and the laws of biochemistry.