
Vollgas geben
to go full throttle
To drive a vehicle at maximum speed by pressing the accelerator pedal all the way down.
Sobald er auf der Autobahn war, gab er Vollgas.
As soon as he was on the highway, he went full throttle.
full throttle
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to go full throttle
To drive a vehicle at maximum speed by pressing the accelerator pedal all the way down.
Sobald er auf der Autobahn war, gab er Vollgas.
As soon as he was on the highway, he went full throttle.

to go all out
In a figurative sense: to devote yourself to a task or goal with full energy, maximum effort, and maximum speed.
Um das Projekt rechtzeitig fertigzustellen, müssen wir jetzt alle Vollgas geben.
To finish the project on time, we all have to go all out now.
The word is made up of 'voll' (full) and 'Gas' (gas/throttle). Its literal meaning is therefore to press a vehicle's accelerator pedal all the way down.
Der Rennfahrer gab auf der Zielgeraden Vollgas.
The race car driver went full throttle on the final straight.
'Vollgas' is used almost exclusively in the fixed expression 'Vollgas geben' (to go full throttle / to go all out). The noun on its own without the verb 'geben' (to give) is very rare.
In der letzten Woche vor der Prüfung müssen wir nochmal richtig Vollgas geben.
In the last week before the exam, we really have to go all out again.
You can recognize the figurative meaning from the context. If people are talking about work, sports, studying, or projects, it means putting in full energy. If the topic is vehicles, the literal meaning is intended.
Die Mannschaft hat im Finale von Anfang an Vollgas gegeben.
The team went all out from the very beginning in the final.
The figurative expression 'Vollgas geben' (to go all out) belongs more to colloquial and informal language. It is often used in motivational contexts at work or in sports.
Kommt, Leute, lasst uns Vollgas geben, dann schaffen wir das heute noch!
Come on, everyone, let's go all out, and then we'll still get this done today!