From Allen Ginsburg's "Howl," a poem that's too Whitmanian for my taste, though I can bring myself to admire it. It has that wordmashup thing going, the way Kerouac has in the The Subterraneans.
yacketayakking screaming vomiting whispering facts and memories and
[two-space indentation] anecdotes and eyeball kicks and shocks of hospitals and jails and wars,
An exceptional y word because the end y is a starter y. Also, instead of yackety (as in yackety-yak), Ginsberg gives us the caricatural yacketay.