1. whank - Noun
2. whank - Verb
(Scotland, Northern England) A strike with the fist; a blow; a knock.
A whank at the door.
(Scotland, Northern England) A large portion, slice or lump.
(Scotland, Northern England) To beat; to thrash; to whip; to lash.
(Scotland, Northern England) To cut, especially to cut off a large portion.
Source: en.wiktionary.org