sputtering (Noun) — The noise of something spattering or sputtering explosively.
sputtering (Verb) — Make an explosive sound. ex. "sputtering engines"
sputtering (Verb) — Cause to undergo a process in which atoms are removed. ex. "The solar wind protons must sputter away the surface atoms of the dust"
sputtering (Verb) — Climb awkwardly, as if by scrambling.
sputtering (Verb) — Utter with a spitting sound, as if in a rage.
sputtering (Verb) — Spit up in an explosive manner.