Today’s comic is Hi & Lois featuring baby Trixie.
“Uh oh, Trixie, you may be running a temperature.” – Lois (Mother)
“That’s impossible! I can’t even walk yet.” – Trixie thinking to herself
Running a temperature? What does it have to do with walking?
The expression “running a temperature” does not literally have anything to do with the action of running or walking. It means that someone has or is developing a fever.
A fever is when one has a higher than average body temperature. This means that Trixie is getting sick and her temperature is higher than normal.
Because Trixie is a baby she takes the meaning of “running a temperature” to be literal and is therefore confused as to what her mother is saying. Trixie understands that she is sick but does not realize her mother just used a popular expression to describe when one is sick with a high temperature, a fever.