fonefart Share definition Flag when a texter leaves out a word in a message that needs to be there leaving the reader to figure it out When Bob texts me I have to read his mind to fill in his fonefarts like "I'll be in 5 min" fonefart by penniesfromheaven November 17, 2009 0 0 Get merch Get the fonefart mug. Buy Now — $32.95 See more merch