Multitasking de acordo com a Wikipedia:

Human multitasking is the best performance by an individual of appearing to handle more than one task at the same time. The term is derived from computer multitasking. An example of multitasking is taking phone calls while typing an email. Some believe that multitasking can result in time wasted due to human context switching and apparently causing more errors due to insufficient attention.

Multitasking de acordo com o Gollum / Smeagol:

Human multitasking is the best (worst, they are worstsy and tricksy precious!) performance by an individual (computer!) of appearing (failing, failing precious!) to handle more than one task at the same time. The term is derived from computer multitasking (I told you they were computers precious!). An example of multitasking is taking phone calls (trying to write and stay calm precious, calmmm!) while typing an email. (a pointless email, they will never take your comments anyway precious).  Some believe that multitasking can result in time wasted due to human context switching and apparently causing more errors due to insufficient attention (yes, precious, that's it my precious).