Opposite of multitasker, a singletasker is one who only takes upon one task at a time, and follows it through to completion. Often used sardonically when someone is bragging about their supreme multitasking skills.
Bobby: "Today I'm only going to focus on finishing my TPS reports and not to answer the phone, email, text, IM, staple, and make breakfast simultaneously."

Jeffy: "You are such the singletasker!"

Bobby: "I can't even respond to you at this time, because then I'd be multitasking."
by TMGuy November 18, 2009
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