To acquire a lot of money; clean up: John really made a bundle on the deal(1905+)
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 make a bundle
make a bundle
Also,make a pile. Make a great deal of money, as in When the market went up they made a bundle, or He made a pile from that department store. The first term, dating from about 1900, comes from the somewhat earlier use of bundle for a roll of banknotes. The variant, alluding to a heap of money, was first recorded in 1864.