Definition
Something with continuous (typically positive) consequences.
How People Actually Use It
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.
"you: oh man i gave my GF Gonorrhea me: the gift that keeps on giving to your next partner"
Source: Urban Dictionary