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1.
A breed of Coyote that will murder your face off and then put it back on, and you'll be like "Thank you!" and they'll be like "Nah, psych!" and they'll murder it right back off.

They live in the wild of the neighborhood on certain days and often "mess people up."
Oh man, that Coyotian Murder Dog almost murdered my face off again.
by MrHaaxMan May 17, 2011
 
2.
a.k.a. a coyote.
"Look over there, in that driveway, that's like, a coyotian murderdog"
by Moe' Suckra December 28, 2011