bonobos. Bantu people fish for termites with more elaborate techniques. See videos. F fission and fusion Chimpanzee unit groups repeatedly split into small parties, then later rejoin into larger ones, depending largely on abundance and distribution of food supply. Also bonobo unit groups and human hunting bands. fist See hit. fist ground See hit ground with fist. fixed stare See stare fixedly. flabby bottom Goodall: Loose and wrinkled sexual swelling during the final stage of detumescence. flail Brandish arm or branch for threat display, solicitation of play, or solo play, or brandish and beat animal to ground in order to kill it. See also flail arm or flail long object. See video. flail arm Brandish or bring down arm as threat display or play solicitation. 2. See video.