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1.
A beautiful person, exquisite, and one of a kind. very nice. unselfish. trustworthy.
"Do you see Caileigh over there?" "yeah, she is so hot. i wish i could get the nerve to ask her out.
by sexyperson12345 August 12, 2011
 
2.
to have a cailiegh. an old Irish saying meaning to have a moment of stupidity or to become mentally challenged fir a long period of time.
oh, silly patrick, he must be having a caileigh
by eli1892753 October 30, 2014