Definition of "SWL"

SWL

noun
countable and uncountable, plural SWLs
1. (physics) Initialism of sound power level.
2. (medicine) Initialism of shock-wave lithotripsy.
3. (uncountable, amateur radio) Initialism of shortwave listening.
4. (countable, amateur radio) Initialism of shortwave listener.
phrase
1. (Internet slang, text messaging) Initialism of screaming with laughter.
  Quotations
  “He fired back at her, blaming her for their breakup, saying she was self-absorbed and always put her own needs above his. He predicted that by the time their senior prom rolled around, she would regret letting him go. To which Claire responded: YGTBKM. SWL.” ¶ “Translation?” ¶ “'You've got to be kidding me. Screaming with laughter.'”
  2008, Maureen Smith, No One But You, New York, NY: Dafina Books, page 109