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1.
An expletive, often used in the field of securities trading. Used to express anger, disgust, or even excitement, "plutt" is an acceptable substitute for a number of other, more obscene terms.
"Plutt! These Oxnard GO's just got downgraded from AAA to AA."
by muni007 November 26, 2009
 
2.
The sound a man makes when he is masturbating, often refered to as skeet or other sounds
I saw Jessica Simpson and almost plutted in my pants.
by SKANKASAURUS February 22, 2007