1. noun /ˈwɒl.əp/
"Youre a gent," said the other, straightening his shoulders again. He appeared not to have noticed Winstons blue overalls. "Pint!" he added aggressively to the barman. "Pint of wallop."
b) A persons ability to throw such punches.
2. verb /ˈwɒl.əp/
Wikipedia foundation.