Shorting

verb

1. To cause a short circuit in (something).
2. Of an electrical circuit, to short circuit.
3. To shortchange.
4. To provide with a smaller than agreed or labeled amount.

   "This is the third time I’ve caught them shorting us."

5. To sell something, especially securities, that one does not own at the moment for delivery at a later date in hopes of profiting from a decline in the price; to sell short.