Talk, esp relaxed and idle conversation; phatic communion; chin music, chitchat: He's very serious and has a hard time making small talk(1751+)
The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D. Copyright (C) 2007 by HarperCollins Publishers. Cite This Source
Idioms and Phrases with small talk
Casual or trivial conversation, chitchat, as in We stood around making small talk until the guest of honor arrived. The small in this expression alludes to unimportant subjects of conversation, as opposed to serious or weighty ones.