
Throw in
Unplanned Extra
Indicates a bonus item or service given unexpectedly in addition to what's purchased.

They threw in a phone case with my new smartphone.
Negotiation Tool
Used as a persuasive offer during negotiations to sweeten a deal.

If you buy today, we can throw in an extended warranty.
Not Always Literal
The added item isn't always physical; it could be an additional service or favour.

With every haircut, we throw in a complimentary scalp massage.
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