catch napping

Meaning

1. catch sb napping

   to get an advantage over sb by doing sth when they are not expecting it and not ready for it

From the same entry

• catch your breath
• catch your death
• catch eye
• catch it
• catch on the hop
• catch red - handed
• catch with their pants down
• off balance
• be in a cleft stick
• the early bird catches the worm
• catch fancy
• catch on the raw