A giraffe fight is when males try to establish dominance in a pack to impress a female. Usually the males greatly outnumber the females.
(at a party with a high male to female ratio) Oh man, its a giraffe fight in here.
When to men swing their flacid penis' together which then wrap around each other, like two giraffe's fighting.
Mike: Were you at the party on Saturday?
Dave: No. What happened?
Mike: There were these two drunk ass guys giraffe fighting. It sounded like 2 pieces of wet meat slapping together.