1. The reason that your here reading this.
2. One of the mostly likely reasons if you did not come to this world.
1. Person 1 : Check this out!!! It's the definition of gay.
Person 2 : Yeah... You... your gay 2. Dad to kid: Only if i was gay then i wouldn't have to deal with you.
The dictionary definition is happy, but it has come to mean homosexual, and often is used as a general negative word to mean stupid, dumb, useless, boring, mean, or anything negative.
Some people say that people who use the word "gay" as something negative are ignorant, or homophobic, however the word is so commonly used that many smart, non homophobic people use the word.