When you are using a highlighter, you may become "highlighter happy."
This means that you when you put your highlighter down to highlight, you cannot stop drawing. Soon, your whole paper may be colored with drawings and brightly colored lines.
Guy1: "Dude! What's all over your paper?"
Guy2: "Highlighter, man. I got a little highlighter happy."
When you take a shit and you wipe your ass so many times and it just doesn’t stop staining the toilet paper, your asshole then becomes a highlighter due to the amount of wipes it takes to flawlessly clean your asshole.
Heydan why were you in the bathroom so long? I had a highlighter shit.
A girl who is very organized and neat, good at organizing and thus is very successful in the school system and gets good grades as a result.
Linda: Honey, Stacy is such a 20 highlighter girl, she reads the history textbook for hours memorizing every minute detail.
Henrietta: Well that explains her 7.38 GPA.
The act of cramming ones own feces into the complimentary hotel hair dryer so that the next unsuspecting person to use it gets a head full of brown highlights.
The hershey highlighter should only be used at seedy grungy hotels that you will not be returning to and at the same time encouraging the next guest to seek other hotels for future occasions.
"This hotel was kicking us out and i decided to leave a hershey highlighter in the room."
"Jane i really love how those hershey highlights bring out your eyes"