If you keep it, and it's over the taxable limit, you have to report it and pay tax.
https://www.irs.gov/businesses/small-businesses-self-employe...
"Who pays the gift tax? The donor is generally responsible for paying the gift tax."
>For example, if you go on price is right, and you win a nice trip to tahiti
Those are prizes or winnings, not gifts. Totally different tax treatment.
If you keep it, and it's over the taxable limit, you have to report it and pay tax.