First coming strongly on the scene in the 1970's meaning
bullshit, unbelievable, etc. but has since evolved into a totally different meaning.
The more modernized form is used to refer to the action of
fingering a girl or
guy (inserting your fingers into your own or another's vagina/ass as a form of pleasure; having another's fingers inserted into your vagina/ass as a form of pleasure).
Jive is often considered a less vulgar alternative to the term "fingering".