Wiktionary
n. A liquid used to ease a sore throat and possibly suppress excess coughing.
Wikipedia
"Cough Syrup" is a song by American alternative rock band Young the Giant from their eponymous debut album. It was composed when the band was named The Jakes, and first appeared on their 2008 EP Shake My Hand. Released by Young The Giant as a single in 2011, the song peaked at number three on the Billboard Alternative Songs chart.
Usage examples of "cough syrup".
LANEY drinks half of one of the bottles of cough syrup, chews and swallows a third of one of the candy bars, and washes this down with a swallow of the lukewarm cola.
She stopped for a moment and took a swig of cough syrup, seeing the faces in front of her.
Fortunately it took all day to concoct both the restorative soup and Desdra's cough syrup.
The vaporizer had had little noticeable effect and Jamie claimed the cough syrup was worthless.
She took the mug with the cough syrup from Mendelsky and sipped slowly.
MacDunlap let out a soft yelp and then took a liver pill, a kidney pill, and a tablespoon of cough syrup in rapid succession.