DictionaryAI

molly

SayMOL-eeUS/ˈmɑli/UK/ˈmɒli/

Pluralmollies (some meanings)

Verbmollies, mollying, mollied

11 meanings of molly

Practice

  1. 1
    party drugnounslanguncountable
    MDMA in powder or crystal form, sold as pure but often mixed with or replaced by other drugs.

    Medics at the festival treated several people who had taken molly in the summer heat.

    Prosecutors said the powder sold as molly was really a mix of cheaper drugs.

    UsageUse take molly for using the drug and be on molly for being under its effects.

    Similarmandy

    Note

    The girl's name probably attached itself to the drug through molecule, a word for pure MDMA, and mandy, another girl's name, does the same work.

    Checked 2 Nov 2026 · 2 facts

  2. 2
    aquarium fishnouncountable
    Any fish of the genus Poecilia other than the ones known as guppies.

    The pet store keeps its mollies in a separate tank from the guppies.

    A molly darted out from behind the rock to grab the flakes of food.

    Note

    The name is a fossil of old taxonomy: it comes from Mollienesia, a genus name that is no longer valid, shaped in passing by the girl's name Molly. Scientists now place these fish in Poecilia alongside the guppies, but the short name stayed in the aquarium trade.

    Checked 31 Oct 2026 · 5 facts

  3. 3
    wall anchornouncountable or uncountable
    A molly bolt, a metal anchor that spreads open behind a hollow wall so that a screw can hold in it.

    A nail won't hold the shelf in drywall, so put in a couple of mollies.

    The installer tightened the molly until its sleeve spread out behind the panel.

  4. 4
    female catnouncountable or uncountable
    A female cat, usually one that has been spayed.

    The vet confirmed that the stray was a molly, already spayed by a previous owner.

    We adopted a gray tabby molly from the shelter last spring.

    Oppositetom

  5. 5
    nounslangcountable
    In video games, a Molotov cocktail, the thrown bottle of fuel that bursts into flames.

    She threw a molly onto the bomb site to stop the defuse.

    The patch shortened how long mollies burn, so they are less useful for blocking doorways.

    Note

    Players clipped Molotov to molly, and in team shooters the thing it names is as much a barrier as a weapon: it leaves a patch of fire that deals damage tick by tick, so it is thrown to block a doorway or drive opponents out of cover. Where heroes each carry their own version, players speak of a character's molly.

    Checked 31 Oct 2026 · 3 facts

  6. 6
    verbintransitive
    Of a man, to engage in sexual activity with another man.
    Note

    The verb belongs to the molly-houses and courtrooms of eighteenth-century London, where it was flung as an insult and denied before the bench: "I never mollied you... My Lord, I never laid Hands upon him." It survives mainly in histories of that world, such as Peter Ackroyd's Queer City, so it reads as a period term, not a living one.

Practice

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Origins

Meanings 1, 3–4, 6

The drug meaning was probably shaped by molecule, used as a name for MDMA. The word itself is the personal name Molly, a familiar form of Mary, though some uses may instead come from mollitia, meaning softness or weakness.

Meaning 2

Mollienesia, a genus name that taxonomists do not accept as valid, gave the word, and the personal name Molly influenced it.

Meaning 5

A shortening of Molotov.

Checked 31 Oct 2026 · 1 fact