Lellow is 'yellow' with an l instead of y. it is most often used to make people laugh, if your 6 or under, if you have a speach problem, or if you are just being reallie dumb.
Kirsten: "Hehe your very lellow today Nick! :) "
Nick: "Thanks. Your ora is very Lellow."
Baby: The bee is lellow and black!
Mom: Well done! That's right!
Me lurking in the shadows under my breath: Hmm, so he says 'yellow' like 'lellow'. Finally, his weakness has been discovered!