Green’s Dictionary of Slang

(N.Z. prison) a package of contraband inserted in the rectum or lower intestine, also in v. use.

2001

D. Looser Boobslang [U. Canterbury D.Phil. thesis] 75/1: full charge n. a package of contraband inserted into the rectum, or in some cases, into the lower intestine, for the purposes of smuggling or safe-keeping [...] full charge n. v.