An unspecified sex act between animals as described in the Geneis story re-visited on Fark.com.
"...the rhinocerous and the elephant gave the hippo a trunk job..."
by Nathaniel Taggart March 27, 2008
1 more definition
A trunk job is the act of putting someone in the trunk of a car after you've killed him/her or before you decide to kill or dispose of him /her.
by Tattootony911 August 17, 2011