To increase. A noun or pronoun can be used between "ramp" and "up." Ever since that break-in, they've really ramped up security at the office.You need to seriously ramp up your study efforts if you want to get an A on this exam.
ramp up
v.
To increase the volume, amount, or rate of something: The factory must ramp up production due to increased demand for its products. I added a new card to my computer memory to ramp it up.