Urban Dictionary: Saturdaynightitis

Top definition

When your arm goes dead after having it hang over a chair all night when talking to a pretty girl.

Hey, look at that dude over there. His arms gone limp.
Yup, he's got saturdaynightitis.

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.