gap out
v.— «“Also can’t find much on gill mites in my books = what exactly are they?” “There is no such thing, that is why you can’t find it. I’m sure the store owner just gapped out for a second when telling about gill mites as well*probably meaning to say flukes.”» —“Re: GF: Gill Mites -Reply” by John Och Usenet: rec.aquaria.freshwater.goldfish Sept. 11, 1997. (source: Double-Tongued Dictionary)