The metal child-resistant cigarette lighter protection strip, especially on Bic lighters. Can also be referred to as 'lighter foreskin'.
"Dammit, I can't light the hash oil, the stupid chastity strip keeps scuffin' my thumb!"

"Man, good thing I didn't rip off the chastity strip yet, I need something to scoop the hash oil onto the bowl."
by Senor Mota October 1, 2008
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