flit Share definition Flag In recent times, flit has become shorthand for "fucking lit." Pat was invited to the party by Wobert."Hey Pat, there's a party this weekend. Can you make it?" "Yeah, I'll make it." "fliiiiit." "What?" "Flit? It just means fucking lit." "Kill yourself" flit by abcwobert June 21, 2016 Get the flit mug.