Beatles n.

Old English beatan "inflict blows on, strike repeatedly, thrash" (class VII strong verb; past tense beot, past participle beaten), from Proto-Germanic *bautan (source also of Old Norse bauta, Old High German bozan "to beat"), from PIE root *bhau- "to strike."

Past tense form beat is from c. 1500, probably not from Old English but a shortening of Middle English beted. Of the heart, c. 1200, from notion of it striking against the breast.

The meaning "overcome in a contest" is from 1610s (hence the sense of "legally avoid, escape" in beat the charges, etc., attested from c. 1920 in underworld slang). The sense of "be too difficult for" intellectually or physically (by 1870) is behind the shrug-phrase beats me.

The meaning "strike cover to rouse or drive game" (c. 1400) is the source of beat around (or about) the bush (1570s), the metaphoric sense of which has shifted from "make preliminary motions" to "avoid, evade." The nautical sense of "make progress against the wind by means of alternate tacks" is from 1670s. Command beat it "go away" is recorded by 1906 (though "action of feet upon the ground" was a sense of Old English betan); it is attested in 1903 as newsboy slang for "travel without paying by riding on the outside of a train."

1963; see Beatles + mania.

In September [1963], the Beatles played the Royal Albert Hall in London, and in October they had top bill on "Val Parnell's Sunday Night at the Palladium" show. Fans lined up all day on Argyll Street outside the Palladium for a glimpse of the boys, a phenomenon that was unprecedented at that time. Hundreds of extra policemen were called in to deal with the crowd, and some later estimated that as many as 2,000 girls mobbed the band as they tried to enter the theater. ... All major British newspapers headlined the story the next day, and the term "Beatlemania" was coined to describe the frenzy and hysteria that fans exhibited over the Beatles. [Jacqueline Edmondson, "John Lennon: A Biography," 2010]