phut-phut1
/ˌfʌtˈfʌt/(also phutt-phutt)
verb
[no object] To make intermittent muffled explosive sounds like a small internal-combustion engine; to move with such a noise.
Origin
1930s. Reduplication of phut. Compare earlier phut-phut, phut-phut, put-put.
phut-phut2
/ˌfʌtˈfʌt/(also phutt-phutt)
exclamation
Representing an intermittent or repeated dull, usually plosive sound, especially that characteristic of an internal-combustion engine.
noun
1An intermittent or repeated dull, usually plosive sound, especially the sound characteristic of an internal-combustion engine.
2= phutphuti. Now chiefly Indian English.
Origin
Early 20th century; earliest use found in The Living Age. Reduplication of phut.