late 14c., from Old French disposer (13c.) "arrange, order, control, regulate" (influenced in form by poser "to place"), from Latin disponere "put in order, arrange, distribute," from dis- "apart" (see dis-) + ponere "to put, place" (see position). Related: Disposed; disposing.
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 dispose of
Attend to, settle, deal with, as in He quickly disposed of the problem.
[ Early 1600s
Transfer, part with, as by giving away or selling. For example, They wanted to dispose of the land as soon as possible.
[ Second half of 1600s
Get rid of, throw out, as in Can we dispose of the trash in this barrel? Oliver Goldsmith had this idiom in She Stoops to Conquer (1773): “I'm disposing of the husband before I have secured the lover.”
Kill or destroy; also, humorously, consume. For example, The king was determined to dispose of his enemies, or John disposed of the cake in no time.
[ Second half of 1800s