When a female is blessed with appealing mammary glands which have the tendency to distract males focus, she is stacked up.
Mark-"How'd your date go? did she have nice boobs?"
Matt-"Yeah that ho was STACKED UP!"
by Dr.vonlinkphipps November 30, 2011
When two people (typically males) sleep on top of each other, facing each other, penises dangling.
"Hey Clay, that was so pleasant sleeping stacked up with you the other night." -Petre
by mmmmNOPE! October 08, 2013

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