Frazier, rambling down the open road in his van, is a great companion.
Read David Stockman if you want a rambling rant on that topic.
After a rambling and incoherent response, he came to the heart of the matter.
mid-15c., perhaps frequentative of romen "to walk, go" (see roam), perhaps via romblen (late 14c.) "to ramble." The vowel change perhaps by influence of Middle Dutch rammelen, a derivative of rammen "copulate," "used of the night wanderings of the amorous cat" [Weekley]. Meaning "to talk or write incoherently" is from 1630s. Related: Rambled; rambling.
"a roving or wandering," 1650s, from ramble (v.).