ENGLISH
REFERENCE

light a fire under

idiom
Meaning

To motivate or encourage (someone) to start sooner or move faster.


Origin

disputed origin

Referring to a time when, if chimney sweeps were afraid to ascend a chimney, the fire would be lit under them in order to motivate them to climb to the top.

Examples
SIMPLE

The deadline is close, so I need to light a fire under my team.

CONTEXTUAL

Our manager lit a fire under the sales department after profits dropped last quarter.

COMPLEX

The coach's harsh words at halftime finally lit a fire under the players, who returned to the field with a desperate energy that turned the game around.

Anchors to
Related idioms8entries
  1. 01

    add fuel to the fire

    To worsen a conflict between people; to inflame an already tense situation.

  2. 02

    amber light

    Hesitance to proceed; limited approval or permission to proceed.

  3. 03

    ball of fire

    A person who is especially active, ambitious, hard-working, or high-achieving.

  4. 04

    bright lights

    The glamour and glitz of a place, especially a big city.

  5. 05

    bring to light

    To expose, disclose or reveal something that was hidden or unknown.

  6. 06

    catch fire

    To become engulfed in flames, to combust.

  7. 07

    come to light

    To become known; to be revealed.

  8. 08

    draw fire

    To create a distraction that allows one's friends, co-workers, or other associates to gain an advantage over the distracted party.

Last updated April 17, 2026