Daddy-long-legs is from 1814 in Britain as "crane-fly," a slender, long-legged summer fly. In the U.S., it was used by 1865 as the word for a spider-like arachnid with a small round body and very long, slender legs.
A superstition obtains among our cow-boys that if a cow be lost, its whereabouts may be learned by inquiring of the Daddy-Long-legs (Phalangium), which points out the direction of the lost animal with one of its fore legs. [Frank Cowan, "Curious Facts in the History of Insects, Including Spiders and Scorpions," Philadelphia, 1865]
"father," 1680s, from French papa, from Latin papa, originally a reduplicated child's word, similar to Greek pappa (vocative) "o father," pappas "father," pappos "grandfather." The native word is daddy; according to OED the first use of papa was in courtly speech, as a continental affectation, and it was not used by common folk until late 18c.
also spazz, by 1959, U.S. teen slang phrase, typically in later use a put-down, apparently a derogatory shortening of spastic (n.). Also used as a verb, by 1972, often with out (adv.). Related: Spazzed; spazzing.
My Daddy is a regular spaz. You don't know what a spaz is? Let me tell you. A spaz is a guy who's completely out of this world—but I mean, completely. [Parade Magazine, March 1, 1959]
[Y]our teen-aged daughter asks what you think of her "shades," which you are canny enough to know are her sunglasses, and you say, "cool," and she says, "oh dad, what a spaz!" [Russell Baker column, April 13, 1965]