I'm not even considering getting one, I'm just asking.
-I think it would be funny for me to get "IAWTC" tattooed on myself because I'm an art student and we do critiques where one would find themselves saying "I agree with this comment" ANNND I'm an internet nerd. But I don't like that acronym, so I wouldn't.
-lined paper on your forearm to write notes.
-a blank post-it
-a musical note on your foot (footnote!)
-across your knux: [ K-N-U-C ][ K-L-E-S ]
EDIT: lower lip tat ideas: