Definitions

1. verb

to spit or expectorate noisily, especially in a fit of coughing

“The sick child sput out a glob of phlegm”

2. verb

to spatter or splash something, especially when thrown or thrown violently

“The muddy water sput against the wall”

3. noun

a sudden, short, explosive emission of a fluid or gas, such as a burst of steam

“The engine let out a sput of steam when it overheated”