vampire, n. — Green’s Dictionary of Slang

vampire n.

[a play on SE bloodsucker]

one who obtains services, typically theatre tickets, for free.

1843

Whip & Satirist of NY & Brooklyn (NY) 21 Jan. n.p.: We belong to that interesting class of citizens termed [...] ‘dead-heads’ and ‘vampyres’ and that for want of a better house, we make the Chatham Theatre our ‘head quarters’.

In compounds

vampire’s teabag (n.) (also vampire-bag, vampire teabag) [coarse use of SE]

(US black) a sanitary napkin.

1990		D. Bolger Journey Home 61: She has a vampire’s teabag in.
1992		J. Mowry Way Past Cool 9: ‘Hey, what you call a used Kotex?’ ‘Vampire tea bag!’ answered Ric.
1995		Francis-Jackson Official Dancehall Dict. 53: Vampire-bag sanitary pad: u. she a wear ’ar vampire-bag.