Synonyms for Suck dry:

v.

deplete (verb)
drain, empty.
drain (verb)
dry, pump out, catheterize.
dry (verb)
catheterize, dry, dehydrate, wring out, swab, mop, desiccate, wither, evaporate, drain, stanch, empty, vaporize, blot, dehumidify, parch, wipe, pump out.

Other synonyms:

Other relevant words:
catheterize, drain, pump out.