What is mop on a urine drug test?

Mop is not a substance that would typically be tested for in a urine drug test. "MOP" may refer to "morphine," which is an opioid drug that can be detected in urine tests. However, the specific detection window for morphine may depend on the type of drug test being used. In general, opioid drugs like morphine can be detected in urine for up to 3-4 days after last use. It's important to note that using opioids without a prescription or in a manner other than as prescribed can be dangerous and illegal.