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Definition of molly

molly

/ˈmɑːli/
mol · ly

Plural:mollies
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molly Lexical Profile

molly Game Scores & Validity

• noun

1

A slang term for the recreational drug MDMA, typically found in crystalline powder or capsule form, known for its euphoric and empathogenic effects.

Example

"Law enforcement agencies have issued warnings about the severe dangers of dehydration associated with taking molly at summer music festivals."


2

A small, live-bearing freshwater or brackish water fish of the genus Poecilia, native to the Americas and widely kept in home aquariums.

Example

"The black molly darted gracefully through the aquatic plants in the newly established community tank."


3

North American A type of hollow-wall anchor used to securely fasten screws into drywall, plaster, or other brittle paneling.

Example

"You will need to use a molly to ensure the heavy mirror doesn't pull the screws straight out of the drywall."

Synonyms
View all synonyms for molly

Word Nuance & Usage

In recreational drug contexts, 'molly' specifically denotes the crystalline powder form of MDMA, historically marketed to imply a higher purity than pressed 'ecstasy' pills.

• Rhymes for molly

Word Origin & Etymology

The aquarium fish derives its name from the obsolete genus name 'Mollienesia' (named after French minister Nicolas Mollien). The drug slang is believed to be a diminutive of 'molecule', reflecting its supposed pure molecular state.

Usage Trend

Historical frequency of usage in published text.

180019102020

Cite this Entry


Wordmom. (2026). Definition of Molly. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/molly
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