Definitions of steamroller:

• noun:   vehicle equipped with heavy wide smooth rollers for compacting roads and pavements
• noun:   a massive inexorable force that seems to crush everything in its way
• verb:   proceed with great force

  Example: "The new teacher tends to steamroller"

• verb:   bring to a specified state by overwhelming force or pressure

  Example: "The Senator steamrollered the bill to defeat"

• verb:   overwhelm by using great force

  Example: "Steamroller the opposition"

• verb:   crush with a steamroller as if to level

  Example: "Steamroller the road"

• verb:   make level or flat with a steamroller