When you turn up to a cycling time trial and perform appallingly, then generate list of excuses in your head as you roll back from the finish to the race HQ, but cannot think of any so blame it on a cold you might have had recently.
"Pete that was a shit performance"
"I know Trev, got a bit of Chrono Virus and heavy legs"
"What the fuck are heavy legs?"
"Dunno, gfgi"