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1.
To go to bed without taking a bath or shower, especially after a day of sweat/funk inducing activity.
Gurrrrrrl, Did you know that Becky routinely Hot Racks after she spends the day volunteering at the dump, sorting trash!
by Bosschik247 May 18, 2009
 
2.
When two sailors share the same rack (bed), either at the same time or at different times. Hot racking can lead to more intimate relationships.
Yo, those two dudes were hot-racking last night!
by the Rottenest Ralph February 02, 2008