2 definitions by OPPuknoMe
the girl you are talking to for no other reason than in case all your other ho-contacts suddenly turn cold on you. the spare tire in this case would be installed and ready to satisfy your sexual desires
Greg: Man, why you talkin' to Juanita? She's fuckin nasty!
Harold: She's my spare tire, you know, just in case...
Harold: She's my spare tire, you know, just in case...
by OPPuknoMe May 3, 2007