Top definition
when someone is taking a long time between exercises in the gym, this may involve pretending to go to the toilet or just starting a conversation with strangers in order to prolong ones set.
person 1:right bro!im just going to the toilet il be back in a sec.....

5 mins later.....

Person 2:hes still not back its been 10 mins since he went!
Person 3:yeah, hes definatly doing a Tafff
by tobzdogg December 17, 2011
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