pack a wallop is to provide a burst of energy, power, or excitement.

Also to pack a punch.
I put a special kind of gasoline in my car because I thought it would pack a wallop. It didn't.
by azarashi October 6, 2015
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powerful sex skills of a female, ability to make 'short work' of the male! -humbling of the most cocky 'stud'
cheryl really packed a wallop with the gear she possessed! she left john in a spent, babbling heap crying for his mama!

the two salivated and speculated (great phrase!) that judy could pack a wallop!

jane's sex skills didn't quite pack such a wallop when she was 'doing' a woman!

rosanna ground the poison out of him with vigor! she packed quite a wallop!
by michael foolsley August 17, 2010
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