lagger

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From lag +‎ -er.

lagger (plural laggers)

1. One who or that which lags behind; a laggard.
   • 1984, Wisconsin Economic Planning Information, page 75:

     The economic time series can be segregated into leaders, laggers and coinciders in relation to movements in aggregate economic activity.

2. One who installs lagging.
   • 2001, Geoffrey Tweedale, Philip Hansen, Magic Mineral to Killer Dust: Turner & Newall and the Asbestos Hazard:

     In particular, Turner & Newall doggedly contested any claims from the largest high-risk group outside the scheduled factory areas — the laggers.

3. (video games, informal) A player who lags (has a poor or slow network connection).
4. A marker used in the game of hopscotch.
   • 2015 Kathleen, Kage, and the Company, Laggers.

     Laggers, Dear Readers, in case you grew up ignorant of hopscotch, are the markers you use when playing the game.

   • 1981, David L. Gold, Three New York Cityisms: Sliding Pond, Potsy, Akey, Jstor:

     In the 1950s, the game was called hopscotch and the object thrown a lagger /'lagar/. Lagger is apparently related to the verb lag.

5. (slang) A police informant.
6. (slang) A sailor.

• (police informant; sailor): John Camden Hotten (1873) The Slang Dictionary

Blend of legal +‎ nagger

lagger (plural laggers)

1. (slang) A member of support staff responsible for contacting lawyers to check how a case is progressing.

• gargle, gregal, raggle