When I was growing up and through school in the 80s and early 90s it was always kegs, and there wasn't such thing as a wedgie people were kegged , never heard it called keks until I was in my 20's- To hoist something, is to pull something up, not down.
- A keg of beer. A barrel, if you like, usually to hold liquid.
- The word you were looking for, is ‘keks' Sheffield slang for knickers/pants.