WordWeb Online

1. Not prepared or vigilant
   "the blow caught him napping";
   - off-guard, off guard, off one's guard, off his guard, off her guard, off your guard

1. Take a siesta
   "She naps everyday after lunch for an hour";
   - catnap, catch a wink

See also: unready

Type of: catch some Z's, kip [Brit], log Z's, sleep, slumber

Encyclopedia: Napping