from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Crafty, unfair, or underhand dealing; trickery.
from the GNU version of the Collaborative International Dictionary of English
- n. Crafty, unfair, or underhand dealing; unfair practice; trickery.
from The Century Dictionary and Cyclopedia
- n. Clandestine dealing; artifice.
under- + dealing (Wiktionary)
"Now, then, Blunt," said Sir James, turning to the bachelor, "tell me all the ins and outs of this business without any more underdealing."