[flat-out] 
| 1. | moving or working at top speed or with maximum effort; all-out: a flat-out effort by all contestants. |
| 2. | downright; thoroughgoing: Many of the paintings were flat-out forgeries. |
| flat-out (flāt'out') adj. Informal Thoroughgoing; out-and-out: a flat-out promotional campaign; a flat-out deception. |