Top Definition
To steal or hijack one's thunder
Mary thunderjacked Susan's bridal shower by announcing her own engagement during lunch.
by Boogie78 November 07, 2011
When you jackoff during a storm and finish after lightning strikes.
"Dude, it was pouring so hard last night I almost couldn't tell if I was able to do a thunder jack."
by Ponyboymlp April 22, 2016
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