A person, object, place, or thing that is constantly full of surprises and never fails to impress, giving happiness, joy, or providing endless entertainment.
syphilis, AIDS, gonorrhea, chancroid, chlamydia, hepatitiis, herpes, HIV, HPV, gonorrhea, any disease transmitted by sexual activities (STD). you get it from someone and you can give as many as you want.
When you take your wife/girlfriend to a swingers party or gangbang. It's considered a "Gift" that keeps on giving even when you're done having sex with her. There are other people around to keep giving it to her.
Wow I’m glad I’m the first in one hundred years to win all those championships. Do you think my future girl friend will be excited? The gift that keeps on NOT giving.