Onomatopeia
On the platform, pla pla pla, of a bus, chuff chuff chuff, which was an S (and singing still dost soar, and soaring ever singest), it was about noon, ding dang dong, ding dang dong, a ridiculous ephebus, poof poof, who had one of those hats, pooh, suddenly turned (twirl twirl) on his neighbor angrily, grrh grrh, and said, hm hm: "You are purposely jostling me, Sir," Ha ha. Whereupon, phfftt, he threw himself on to a free seat and sat down, plonk.
The same day, a bit later, ding dang dong, ding dang dong, I saw him again in the company of another ephebus, poof poof, who was talking overcoat buttons (boorra boorra, it wasn't as warm as all that...)
Ha ha.
full S bus, one day, at about 12 noon.

on·o·mat·o·poe·ia

[on-uh-mat-uh-pee-uh, ‐mah-tuh‐]noun
1. the formation of a word, as cuckoo, meow, honk, or boom, by imitation of a sound made by or associated with its referent.
2. a word so formed.
3. the use of imitative and naturally suggestive words for rhetorical, dramatic, or poetic effect.

Origin
1570–80:
Late Latin Greek onomatopoiía making of words = onomato- (combining form of ónoma name) + poi- (stem of poieîn to make; see poet) + -ia -ia