bummock

Etymology
For the sense relating to alcohol: from or cognate to 🇨🇬, perhaps from 🇨🇬, a vessel for holding liquid, itself perhaps from Old Norse, compare 🇨🇬.

For the sense relating to ice, perhaps compare how can mean either a similar ice structure or a brewer's vat.

Noun

 * 1)  A brewing of ale.
 * 2) A submerged, downward-projecting piece of ice.