Can you guess my siggy and avvy???

Make a pair of pants where the trouser legs are the legs of a velociraptor. Have a tail on said pants, and attach the front of a velociraptor to the front of said pants. Over the sides of said pants, attach legs made to look like your own. It's not easy, but it's effective.

Picture for reference:

Make sure you keep the baby when you make your raptor costume.