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2.
commonly refers to a woman who has a great amount of sex with a large assortment of men. her meat curtains are always inhabited with a different male. the word comes from the term being "slammed", in the sense of Dwight Howard of teh Magic
D:yo jared have you seen that girl down the hall?
Jared: no, but i could hear her gettin slammed, i'm definitely staying away from that slamma jamma, because i don't want to catch what all those guys have
by d14george December 10, 2008
 
1.
When someone reaches orgasm upon the first thrust of coitus.

May also be used as a verb, e.g., "Her cave was so tight, we slammajammad right there on the table."
I knew I wouldn't last long, and sure enough, it turned out to be slammajamma.
by blue78 February 07, 2009