1. Not prepared or vigilant
   - napping, off-guard, off guard, off one's guard, off his guard, off your guard

See also: unready

• two dollar bill
• two dozen
• two hundred
• two iron
• Two Kettle
• two times
• two weeks
• two-a-penny
• two-bagger
• two-base hit
• two-baser
• two-bit
• two-by-four
• two-chambered
• two-channel
• two-dimensional
• two-dimensional figure
• two-dimensionality
• two-eared
• two-edged
• two-eyed violet
• two-faced
• two-fisted
• two-footed
• two-grain spelt