The phrasal verb "throw in" is predominantly used in informal speech, though it can occasionally appear in more relaxed, formal contexts such as business meetings when discussing deals or negotiations. It generally means to add an additional item or concession, often as a bonus or at no extra charge. For example, a salesperson might 'throw in' an extra product for free with a purchase, or during a conversation, someone might 'throw in' an additional comment or idea. It is versatile in its usage and can apply to both tangible and intangible additions. "Throw in" suggests spontaneity and generosity, which is why it is suited mostly to casual interactions rather than strictly formal or legal ones, where precision in wording is crucial.
B1
PreIntermediate
1. To add something extra or for free in addition to what is expected.
When you buy the car, the dealer will throw in a set of free floor mats.
If you subscribe now, they’ll throw in an extra month for free.
The chef decided to throw in a complimentary dessert to make up for the wait.
2. To casually introduce or mention something in conversation.
She threw in a comment about the weather during the meeting.
He tends to throw in jokes while giving presentations to lighten the mood.
I’m going to throw in some quick facts before we start the discussion.