After covering your lady friend's face in a healthy dose of your hot man chowder you then proceed to wrap her head in tin or aluminium foil while the aforementioned spunk still remains on her face
When you are about to enact in lude activites with your mate, and you realize niether of you have condoms. You go to the kitchen and grab the Reynolds Wrap. Wrap your penis in the tin foil and proceed with your activities.
A phrase used by Bubbles on the popular Canadian tv series Trailer Park Boys, used as a smart-ass reply when someone asks something to which the answer is yes.
Randy: Does it really launch? (referring to a model rocket)
Bubbles: Does it really launch?! Does the tin man have a sheet metal cock?
Originally from advertising for Ronseal woodcare products this phrase was quickly picked up by the public and turned into a general purpose phrase meaning "the name describes exactly what it is". This must be one of the most successful advertising slogans of all time. Of course Ronseal have trademarked it!