A term made up by the 'Diary of a Wimpy Kid' usedasa 'Your Mom' joke.
Substitute teacher: Greg, can you answer this problem?
Greg: Your Mama!
Subsitute tecaher: Excuse Me?
Greg: Your Big Fanny Granny!
Subsititute Teacher: Well I hardly think that's -
Greg: Your Slaphappy Grandpappy!
The act of overusing your camera from either taking a picture of the same thing multiple times, or taking a picture of everything you can find, or find you need to take a picture of. People who get a new camera often become snap happy.
Basically just using your camera a lot.
"Maria is so snap happy with her new camera she maxed out the 1 gig memory card in one day!"
Last night while having drunken sex with my girlfriend, I dick slapped her and said "HAPPY SHAPApPY BITCH."
She then proceeded to twist my testicles and tell me she isn't speaking to me for the rest of the night, and im taking the couch. FTL :(