Skip to main content
like mad

like mad

13 8.1
Act very quickly and with great effort
  • idiom
  • Informal
translation icon : como loco
  • I'm looking forward like mad to seeing this extravaganza.
  • run like mad
  • fight like mad
  • work like mad

My heart would be like mad before they came to me at Sky.

Autoplay Next

Examples

  • Silent Bob peddles like mad, racing toward the golf cart.

    Fiction book (2001)
  • Liu is eating an apple and reading like mad by candlelight.

    Fiction book (1993)
  • I tried like mad to block that trade.

  • We were yelling like mad.

  • The twins, they were running around like mad and throwing flowers.

  • The funny thing is today the fire alarms were going off like mad in my building.

  • I've missed you like mad.

  • His head felt as if it would burst, and his heart pounded like mad.

    Fiction book (1996)
  • I'm gonna be working like mad, you know, and it means a lot of late nights and, uh, deadlines and, uh, migraines, and, um...

  • I tried like mad to block that trade.

Synonyms

like crazy
vslike mad
  • Informal
86 7.8

With a lot of energy and very quickly

is informal and emphasizes force or vigor of the action
like hell
vslike mad
  • NSFW
75 7.9

Happening very quickly, with great effort or very strongly

matches this meaning exactly but in informal usage
with a vengeance
vslike mad
  • Informal
23 6.7

Very strongly and with a lot of energy

is the informal way to stress vigor rather than formal expression
like gangbusters
vslike mad
  • Informal
6 8.1

Very quickly and with great success

focuses on intensity and effort rather than implying success
like thunder
vslike mad
4 4.7

Very quickly and with great force

leans on strong speed and force as the main emphasis
like sin
vslike mad
  • Informal
1 9.2

To do something very quickly or with great effort

highlights informal intensity and energetic effort rather than formality
like a man possessed
vslike mad
  • Informal
1 7.6

Act with very strong, urgent energy and full focus

expresses strong intensity but without implying uncontrollable driving force
like blue murder
vslike mad
  • UK
9.9

Acts very quickly and with great force

stresses speed and strong force in informal emphasis
like a bull at a gate
vslike mad
  • UK
9.2

Doing something suddenly and forcefully without thinking because you are very eager

covers high speed and effort without stressing recklessness or impatience

Antonyms

1.0

At a low speed without hurrying

12 1.2

In a slow relaxed way that uses little energy

How Intense

like mad
  • Informal
13 8.1
intensely
88 3.1
strongly
638 1.0
fairly
895 1.0
slightly
885 1.0

Surface Forms

like mad positive

Morphology

like + mad

The phrase combines 'like' (as) with 'mad' (crazy), so a B1 learner who knows the words can plausibly infer 'as if crazy' → doing something extremely or frantically, which maps onto the MWE meaning. However, this is a conventionalized, metaphorical intensifier rather than a strictly compositional sense, so the exact range (speed, effort, intensity) is not fully predictable without exposure.

Etymology

Like mad comes from a clear image: someone acting as if they were mad—wild and out of control—so they run or work with a lot of energy. That is why today like mad means doing something 'very quickly' or 'with great energy'.