adj

• (obsolete) Last; long-delayed.
  "the lag end of my life"

noun

• (countable) A gap, a delay; an interval created by something not keeping up; a latency.
  "Although this work is now presented to the world at large, people who read through it before publication severally raised some issues that should be addressed. These resolve around the lag between the field research and the publication of the monograph, a period of rather more than two decades; the use or non-use of various academic forms of terminology, frames of reference, modes of analysis, or "theoretical paradigms"; and my use of the present tense to describe a place that is most certainly not that way now."
• (uncountable) Delay; latency.
  "Whatever the symptom, lag is a drag. But what causes it? One cause is delays in getting the data from your PC to the game server."
• (UK, Ireland, slang, archaic) One sentenced to transportation for a crime.
• (UK, Ireland, slang) A prisoner, a criminal.
  "On both these occasions I had ended up behind the bars, and you might suppose that an old lag like myself would have been getting used to it by now."

verb

• (computing, informal, video games) To respond slowly.
  "My phone is starting to lag."
• (UK, slang, archaic) To transport as a punishment for crime.
  "She lags us if we poach."
• (UK, slang, archaic) To arrest or apprehend.
  ""We must get the old dear out," said Lord Roxton to Malone. "He'll be had for manslaughter if we don't. What I mean, he's not responsible - he'll sock someone and be lagged for it.""
• (transitive) To slacken
  "Interest in the scandal will never lag."

adj

• (poker) Loose (inclined to play many starting hands, including weak ones) and aggressive (inclined to raise often).