blue-tool
A blue-tool is a person that wears a blue-tooth headset 24/7, just to look cool.  In extreme cases the blue-tools in question were found to have worn their headset even without the phone.
Jeremiah: Look at Chris, trying to impress the chicks with he blue-tooth

Jack: Yea man, he's such a blue-tool.  I hear he even wears that thing to bed.