look up any word, like donkey punch:

1 definition by ddbr224

sideline syndrome is the common pain one begins to feel in their legs from standing too long, usually caused by lack of playing time in sports and most common in football
"I haven't played once and its the third quarter"-John
"better look out for sideline syndrome, it could hit any minute now"-Bill
by ddbr224 September 18, 2010