Abbreviation for "Turn away face". Commonly used to denounce a persons credibility or logic. To perform a "TAF" you must open your mouth very widely as if you were going to sneeze , bat your eyelids vigorously, inhale through your nostrils in a deep elongated breath, and place your hand (or any other object) with fingers held firmly together over your own mouth.
Here are a list of things one can TAF at : Your friend thinking hes cool, something undeniably stupid, your brother thinking hes good (at anything) , your mom, your sister, anyone for that matter. You can also TAF when it doesnt apply to anything really. Use it wisely