The act of a person with dreadlocks wrapping a lock or locks tightly around the penis/scrotum of their partner while performing fellatio.
She was the first chick with dreads I've ever fucked, so while she was giving me head I made her do the ol' Jungle Viper.
This hippy chick blew me last night and wrapped her dreads around my cock and said, you've been caught by the Jungle Viper.