'street' is a slang word in this usage. It refers to a certain tough, savvy, independent urban culture of adolescents and young adults, based on their music preferences, their clothing, skateboarding and other pursuits they enjoy.
'to dive' is to jump headfirst. 'dove' is the past tense. 'dived' is an alternative past tense.
'I dove (dived) into the swimming pool.'