From The Collaborative International Dictionary of English v.0.48:
Saddle \Sad"dle\, v. t. [imp. & p. p. Saddled; p. pr. & vb. n.
Saddling.] [AS. sadelian.]
1. To put a saddle upon; to equip (a beast) for riding.
"saddle my horse." --Shak.
[1913 Webster]
Abraham rose up early, . . . and saddled his ass.
--Gen. xxii.
3.
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2. Hence: To fix as a charge or burden upon; to load; to
encumber; as, to saddle a town with the expense of bridges
and highways.
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From The Collaborative International Dictionary of English v.0.48:
Saddled \Sad"dled\, a. (Zool.)
Having a broad patch of color across the back, like a saddle;
saddle-backed.
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