What is the meaning of Slock?

A draught; a gulp.

To swallow, gulp.

To poach (a servant) from another household.

To entice.

An improvised weapon consisting of a padlock placed in a sock, common in prison environments.

To strike with a slock.

To hunt (wild game) with preindustrial tools such as spears, blowguns, slingshots, arrows, crossbows, or others.

Source: wiktionary.org