Throttle up
Definition 1 of 2
Pro Tip 1/3Vehicle Acceleration
Usually means speeding up a vehicle by increasing fuel flow. 
She throttled up her boat to catch up with the others.
Pro Tip 2/3Action Intensity
Can imply increasing the intensity or effort in an activity. 
During the race, he throttled up his pace to take the lead.
Pro Tip 3/3Technical Action
Used in technical contexts like piloting or operating machinery. 
The pilot throttled up for takeoff.
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