GR translation: pale sweaters with pits

[Mike Jing]

P52.22-23  ..., pale sweaters with the pits heaped in a corner, in some accidental gesture, slink or embrace.

/ˈswɛtər/  Show Spelledsweater
1. a knitted jacket or jersey, in pullover or cardigan style, with or without sleeves. 2. a person or thing that sweats. 
Well, it's not even funny any more.  In the published translation, they actually picked definition #2.

Anyway, what exactly is the meaning of "the pits" here?  Maybe sweat stained armpits?

 		 	   		  
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