Definition of "mop"

mop¹

/mɒp/

noun
plural mops
1. An implement for washing floors or similar, made of a piece of cloth, or a collection of thrums, or coarse yarn, fastened to a handle.
2. A wash with a mop; the act of mopping.
3. (humorous) A dense head of hair.
4. (Britain, dialect, obsolete) A fair where servants are hired.
5. (African-American Vernacular, MLE, slang) A firearm particularly if it has a large magazine (compare broom, but still can be related to MP)
  Quotations
  Mainstream in this ting but I'm fully on oppsGot shot with a mop but that boy never dropped
  2021 April 7, M24 (lyrics and music), “Plugged In”, Fumez the Engineer (music)‎, 2:16–2:19
6. (slang) Fellatio
  Quotations
  Had his thot give me mop in the back of my Bimmer
  2019, “Laneswitch”, in True 2 Myself, performed by Lil Tjay
verb
third-person singular simple present mops, present participle mopping, simple past and past participle mopped
1. (transitive) To rub, scrub, clean or wipe with a mop, or as if with a mop.
2. (US, slang) To shoplift.
  Quotations
  By “mopping” (stealing) the clothes and accessories necessary to effect their look, or by buying breasts, reconstructed noses, lifted chins, and female genitals, the children turn traditional ideas of labor around: […]
  2013, Martha Gever, Pratibha Parmar, John Greyson, Queer Looks, page 111

mop²

/mɒp/

noun
plural mops
1. (Britain, dialect, obsolete) The young of any animal.
2. (Britain, dialect, obsolete) A young girl; a moppet.
3. A made-up face; a grimace.
  Quotations
  What mops and mowes it makes! --
  c. 1621, John Fletcher, Philip Massinger, “The Pilgrim”, in Comedies and Tragedies […], London: […] Humphrey Robinson, […], and for Humphrey Moseley […], published 1647, Act IV, scene ii
  Before you can say 'Come' and 'Go,'And breathe twice; and cry 'so, so,'Each one, tripping on his toe,Will be here with mop and mow.
  1610–1611 (date written), William Shakespeare, “The Tempest”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act IV, scene i]
verb
third-person singular simple present mops, present participle mopping, simple past and past participle mopped
1. (intransitive) To make a wry expression with the mouth.
  Quotations
  Flibbertigibbet,[is scared of]moping and mowing, who since possesses chambermaids and waiting-women
  c. 1603–1606, William Shakespeare, “The Tragedie of King Lear”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act IV, scene i]