It is mentioned by Chaucer in his pilgrimage under the name, appropriate to its site, of “bob up and down.”
But they're so silly that they're sure to bob up and stare at him after he has gone along.
"Expect that fool is looking to see it bob up and swim ashore," laughed the Skipper.
Yes; if she's down one minute she'll bob up again the next, like a cork.
Some bob up now and again, when their voices are to be heard at pops.
As long as he kept awake, he could, and did, bob up and down.
You do; you prepare to bob up at afternoon teas,—and dinners—and embarrass me to death with your extinct personality!
With a rushing whizz Frank steered his bob up alongside of the other.
But "Jimmy" will bob up again in due season with a plate of hot cakes or, perhaps, even cool cakes—and the smile.
Then another decoy will bob up, and Blake will go after that.
"move with a short, jerking motion," late 14c., probably connected to Middle English bobben "to strike, beat" (late 13c.), perhaps of echoic origin. Another early sense was "to make a fool of, cheat" (early 14c.). Related: Bobbed; bobbing. The sense in bobbing for apples (or cherries) recorded by 1799.
"act of bobbing," 1540s, from bob (v.1). As a slang word for "shilling" it is attested from 1789, but the signification is unknown.
"short hair," 1680s, attested 1570s in sense of "a horse's tail cut short," from earlier bobbe "cluster" (as of leaves), mid-14c., a northern word, perhaps of Celtic origin (cf. Irish baban "tassel, cluster," Gaelic babag). Used over the years in various senses connected by the notion of "round, hanging mass," e.g. "weight at the end of a line" (1650s). The hair sense was revived with a shift in women's styles early 20c. (verb 1918, noun 1920). Related words include bobby pin, bobby sox, bobsled, bobcat.
: Bob car/ Bob clothes
A Bedouin or Iraqi (1990s+ Gulf War Army)