It means Hey You.
It is mainly used when addressing an individual in any given situation to get his or her attention.

Mercury retrograde is the act of taking a shit whilst mooning one or more human beings. Your day can typically being going well, according to your horoscope, until you are forced into witnessing Mercury retrograde. Performing Mercury retrograde will often speed the astrological cycle forward for the individual performing the Mercury retrograde, bringing about happy and fruitful times to come.

a streamlined fusion of the salutation "hey, yo" that goes over extremely well with the modern urban entrepreneur.

a response for a very suspect or homosexual comment.

often used as a gteeting in replacement of "hey yo"

This is a Nigerian name of the Yoruba dialect which means 'Joy'. It can be combined with other names.

Someone everyone wants to be cause he's sick at everything