armed rubbery
Refers to a scenario whereby da "paw" of a lusted-after chick sits nearby with a double-barreled goose-blaster and keenly watches while you and his "little pumpkin" get it on, in order to make sure dat you always use a condom whenever you "go all da way" with her; da purpose, of course, is to avoid a "shotgun-wedding" type of situation nine months later!
Another definition for "armed rubbery" would be if you tell a hot gal's father dat you just wanna give his gorgeous daughter a naked massage, and so he and Brown Bess stand guard to ensure dat you two do indeed just stick to said firm caresses. :P