to drive a vehicle or other conveyance so as to strike the back end of (another vehicle): My car was rear-ended by another driver on the highway.
2.
(of a moving vehicle or other conveyance) to strike the back end of (another vehicle or object): A freight train rear-ended the commuter train this morning.
n. the tail end; the buttocks. (Euphemistic.) : The dog bit her in the rear end.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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