also: べたぶみ
noun
flooring the gas pedal; pedal to the metal
Colloquial term for pressing the accelerator all the way down; often used in casual driving contexts.
See also: べたっと
高速道路でベタ踏みしたら、あっという間にスピードが出た。
When I floored it on the highway, the speed shot up in no time.
彼はいつもベタ踏みで走るから
He always drives with the pedal to the metal, so his fuel economy is terrible.
More literal and slightly less colloquial than ベタ踏み; means 'accelerator fully open'.
Compound of ベタ (onomatopoeic for 'flat' or 'pressed firmly') and 踏み (noun form of 踏む 'to step on'). The exact derivation is uncertain, but it vividly describes pressing the pedal flat to the floor.