Here are the possible solutions for his nap cost him the race clue
Answer
Clue
Relevancy
hare
Clue
His nap cost him the race
Definition
a very swift mammal like a large rabbit
neko
Clue
Rocker Case who tweeted "If a dude called me a 'cougar' I'd be more likely to kill him bare-handed and shit him out in front of his parents than fuck him"