A person whom is so irresistible that you are willing to:

1) live in a trailer with said person
2) have copious amounts of babies with said person

and do it for the rest of your life because they're that worth it.
"Jack Johnson is so talented and amazing. He is my trailerbaby."

or

"You'd have to be high on crack to make George Bush your trailerbaby."
by Puchley March 31, 2008
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