20-noneyobusinessfoo! Share definition Flag The age of anyone over 25 but under 30. Otherwise known as 20-something. "How old are you" "I'm 20-noneyobusinessfoo!" 20-noneyobusinessfoo! by sarabrady October 8, 2008 0 0 Get merch Get the 20-noneyobusinessfoo! mug. Buy Now — $32.95 See more merch