To trebek is to reference a person to the male genitalia. If a person is being cynical, difficult, or down right annoying labeling them as a trebek is the equivelent of calling them a ,"Dick."
"Wow, Floyd you are being such a trebek right now."
"Oh man... is your trebek alright? I didn't think I could throw that hard."
"GOD, My boss is such a trebek".