flat-footed
1. [ adjective ] with feet flat on the ground; not tiptoe
Related terms: footed
2. [ adjective ] unprepared and unable to react quickly
Examples:

"the new product caught their competitors flat-footed"

Related terms: unready
3. [ adjective ] having broad flat feet that usually turn outward
Examples:

"a slow flat-footed walk"

Related terms: splayfooted
4. [ adjective ] (informal) without reservation
Examples:

"a flat-footed refusal"

Related terms: colloquialism direct
Similar spelling:   flatfoot
  flat-bottomed
  flat-topped
  flat-bottom
  flat-top