To the end that "tipping" refers to enjoying the occasional road soda whilst cruising with a friend down your
local thoroughfare, a tiptarded
individual would be one that did not learn to drink while riding in a car at the appropriate age, and therefore is not ever capable of mastering such as
skill.
"Dude, that was totally 5-oh that we just
passed. Why the
hell would you take a drink of that
Old E forty just then?? You are so tiptarded..."