Güey

[Sonia]

It is both a dear person who you address to regularly, so you call it güey over and over, instead of using its name each time, like dude in english, or a person you consider not to be trustable, because it lacks of the cleverness, wisdom, or experience needed for a certain task, like an asshole, in english. It is the right spelling in spanish for the mexican expression wey, from which you will find similar definitions to the one I just wrote.

[Little_Girl]

Friend, buddy, fool, stupid, dummy.