n. & v.
--n. words, phrases, and uses that are regarded as very informal and are often restricted to special contexts or are peculiar to a specified profession, class, etc. (racing slang; schoolboy slang).
--v.
1. tr. use abusive language to.
2 intr. use such language.
Phrases and idioms:
slanging-match a prolonged exchange of insults.
Etymology: 18th-c. cant: orig. unkn.