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1.
1) The act of assigning or discussing ones work with a colleague right when they are about to leave.

2) The act of cutting any food item into obnoxiously small pieces for one's own personal gain.

3) The act of being lathered in tuna butter.
"Bill was getting ready to meet his friends at happy hour on a thursday evening when his boss Tuna'd him with another hour of monotonous work."

"Who Tuna'd this peppermint patty?"

"It sure smells like someone got tuna'd in here today"
by I Love Lamp 11111 March 06, 2012
 
2.
the act of getting tuna on oneself (past tense)
Girl just got tuna'd. Eeeeeww.
by lilmissjen July 17, 2009