Top definition
A compound word formed from the spanish word "nalga," meaning cheek and the english word rhythm, which describes motion or movement.

Nalgarhythm describes the movement of the posterior, specifically the cheeks.
I don't even like those stupid spinning classes. The only reason I go is to sit in the back and peep that sweet nalgarhythm.
by Bottomless ChronWell May 25, 2009
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