A regional variant common to southern New England for the practical joke/sexual practice known elsewhere as the Dutch oven
: i.e. when one partner holds another partner's head beneath a blanket and passes gas.
Sheets are OK for a gutter helmet, but for the real, face-full-of-flatulence effect, you need to go with a down comforter.
A two-ply condom used when going skanking
or engaging in questionable activities with skanks or suspected skanks..
Bobby needs to use a gutter helmet before he lays the pipe to Britney, Paris, Nicole or any of those other skanks.
Gutter Helmet is the act of getting a blow job from a dirty girl.
Tony always sneak's around with Jennifer so nobody see's then, be he secretly hopes for a little gutter helmet.
Got to run by the store and grab a box of gutter helmets before I hit that skanks' place.