What is "toping"

Tope \Tope\, v. i. [imp. & p. p. Toped (t[=o]pt); p. pr. & vb. n. Toping.] [F. t[^o]per to cover a stake in playing at dice, to accept an offer, t[^o]pe agreed!; -- perhaps imitative of the sound of striking hands on concluding a bargain. From being used in English as a drinking term, probably at first in accepting a toast.] To drink hard or frequently; to drink strong or spiritous liquors to excess.

If you tope in form, and treat.
--Dryden.

vb. (present participle of tope English)