yard-yo
The slightly-disgusted/irritated verbal "I'm over here" (Goobah-brain/Numb-nutz optional) attention-getter that you call to a seemingly-tunnel-visioned visitor who has obliviously walked right past you on his way to knock on the front door of your house, never noticing that you were sortin' fasteners or paintin' up buoys in da tool-shed less than twenty feet away.
There are so many absurdly-unaware people in dis here town; I almost always have to give a yard-yo if I'm outdoors when one of those dim-minded blokes comes a-knocking.