Jaybird noun A blue jay, used in various similes.
1913 Kephart Our Sthn High 107 He’s as antic as a jay bird when he takes the notion. 1940 Hauns Hawk’s Done 7 There’s always the jay birds trying to take a bath in the water bucket. 1952 Brown NC Folklore 1,431 As happy as a jaybird … As naked as a picked jaybird … As naked as a jaybird’s ass … As saucy as a jaybird … Git along about as well as a jaybird does with a sparrer hawk … As spry as a jaybird in wild cherry time. 1956 Hall Coll. Del Rio TN As naked as a jay bird. (Wilford Metcalf) 1962 Dykeman Tall Woman 95 Mark’s always speaking of her eyes too; and the way she clings to him, the way she’s so quick to walk, and talks already like a jaybird chattering-well, he thinks she’s mighty nigh perfection itself.
I live with two jaybirds. Even though they're sillier than any jaybird I ever did see-I wouldn't trade them for the world and all it holds.