Walloper

verb (used with object)
1.
to beat soundly; thrash.
2.
Informal. to strike with a vigorous blow; belt; sock:
After two strikes, he walloped the ball out of the park.
3.
Informal. to defeat thoroughly, as in a game.
4.
Chiefly Scot. to flutter, wobble, or flop about.
verb (used without object)
5.
Informal. to move violently and clumsily:
The puppy walloped down the walk.
6.
(of a liquid) to boil violently.
7.
Obsolete. to gallop.
noun
8.
a vigorous blow.
9.
the ability to deliver vigorous blows, as in boxing:
That fist of his packs a wallop.
10.
Informal.

the ability to effect a forceful impression; punch:
That ad packs a wallop.
a pleasurable thrill; kick:
The joke gave them all a wallop.

11.
Informal. a violent, clumsy movement; lurch.
12.
Obsolete. a gallop.
noun
1.
a person or thing that wallops
2.
(Austral, slang) a policeman
verb -lops, -loping, -loped
1.
(transitive) (informal) to beat soundly; strike hard
2.
(transitive) (informal) to defeat utterly
3.
(intransitive) (dialect) to move in a clumsy manner
4.
(intransitive) (of liquids) to boil violently
noun
5.
(informal) a hard blow
6.
(informal) the ability to hit powerfully, as of a boxer
7.
(informal) a forceful impression
8.
(Brit) a slang word for beer
verb, noun
9.
an obsolete word for gallop
wallflower
wall-eyed
see: pack a punch (wallop)