An ungooglable is a thingus that cannot be found using a search engine. All you can do is talk to your sibling about it, and they might have never seen it.
Some notable Ungooglables are:
A video from a clipart collection of a guy saying “Sales are Up!” from a disc we got with a computer in like 1995
A DOS game where you're a gnome and you walk around a really unfinished looking cave and can throw bones.
We!, the commercial for Women's Entertainment that used the song “We Are Family” without the “Are Family”