Since Patch 183.0 you can gesticulate as much as you want thanks to the new emote menu. You can reach it by pressing the “T”-key (the key assigned to the Dino-Whistle). In that menu, you’ll now find the option “Play Emote” at eleven hours.

There are also two new hotkey options in the option menu: “Emote-Key 1” and “Emote-Key 2”.