Simple past tense and past participle of rubberneck.(verb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "rubbernecked" in a sentence
"They garnered their fair share of rubbernecked and discreet stares because of the teenager's hair."
"As Mr. Avsar oversaw its transportation into the pristine white gallery space, traffic slowed on Bowery as drivers rubbernecked to see whether the vehicle would fit through the doorway."
"In the past I've occasionally rubbernecked episodes from the megalomaniacal empire that is Tyra Banks' and Bankable Productions' America's Next Top Model for kicks."