Period of sadness that occurs after about a month of having a bob that you either spontaneously cut yourself or got cut at a salon, the longer the original length of your hair the worse the hair-depression.
"OMG queen you got a bob" - A
"I love it" - B
*1-2 months later*
"Damn bitch, i miss my long hair, this shit is annoying" - B
"Ah . . . I see you have the bob blues : (" - A
Typically someone who is named Anita, with a blue bob
"Look at that Blue Bob over there!"