(The astericks (*) mark the similies and similie phrases.)
Your granpa: "Geez whiz you young rascal. When my family went on road trips we didn't have a drive-thru to stop at. Us young whippersnappers had to pack our own ham and cheese sandwiches, then we'd hop in the car with our parents, and *we'd be off like a dirty shirt.*"
Your granma recalling the good times on her deathbed. Sighs, "Your granpa used to *ride me like a stallion.*"
Definition: Having a superficial resemblance that leads an untrained or casual observer to mistake two things for being identical, even though a trained eye or specialist can discern clear and often noticeable differences.
"The manager kept insisting the generic and name-brand components were the same, but to the engineer, they were only similarish; the tolerances were clearly different."
A trip to a grocery store, convenience store, or gas station for the sole purpose of buying an excessive amount of junk food and sugary drinks, usually with friends. A chud run often happens late at night and ends with everyone involved hating themselves afterwards.