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1.
incapable of being tired out; not yielding to fatigue; untiring.
Someone who never gets tired is indefatigable
by ms credit card March 22, 2009
 
2.
1. Tireless; relentlessly working; unconquerable

2. A funny word that if said fast enough can be pronounced "in - de - faggot - a - ble". Proper use denotes saying this word to closet homosexuals repeatedly until they catch on.
Person A (straight male) - "Dude, Jerry you're so indefatigable working on that roofing."

Person B (closet homo)- "Yeah man thanks!"

Person A - "You're amazingly inde-faggot-able."

Person B- "I'm beginning to take offense!"

Person A- "Faggot."
by mr. dobalina, mr. bob dobalina February 20, 2011