chest beat: repeated slapping of the chest with one or both hands in order to generate a loud sound (sometimes used by gorillas as a threat display to intimidate an opponent)
domain: territory
the Grunt: snorting, piglike noise made by gorilla parents to express annoyance
me-ball: dried excrement thrown at observers
9,855 days (example): While gorillas in the wild typically gauge the passing of time based on seasons or food availability, Ivan has adopted a tally of days. (9,855 days is equal to twenty-seven years.)
Not-Tag: stuffed toy gorilla
silverback (also, less frequently, grayboss): an adult male over twelve years old with an area of silver hair on his back. The silverback is a figure of authority, responsible for protecting his family.
slimy chimp (slang; offensive): a human (refers to sweat on hairless skin)
vining: casual play (a reference to vine swinging)