the way you hesitantly start a sentence when someone asks or tells you something awkward you don't want to answer. sounds like "well, uhh..."
A: "what the fuck, why didn't you invite me to see toy story 3 with everyone?"
B: "welluh... i guess it just wasn't in the cards."
susie: "larry, can you go help jeff put his pants on? he needs help."
larry: "welluh... you wanna try first?"