humpadumpdump 

i had yor mom humped her then dumped her

humpadumpdump all night long

humpadumpdump by TOMMIE May 13, 2005

humpalumpadump 

when you and your mom have hardcore XXX sex and you make her anus bleed.
This word was derived from Bleedus Anus

Yo' mams lest bump in ma' crib an' "humpalumpadump".

humpalumpadump by Bleedisious Anus April 23, 2005