What is the X in X-mas?
late 14c., probably of imitative origin, similar to Middle Swedish skväka "to squeak, croak." Related: Squeaked; squeaking. The noun is from 1660s; sense of "narrow escape" is from 1822.
: Okay, what's your squawk this morning? (1909+)
[echoic of an unpleasant sound, esp the grating screech of a bird]