A cougar that is so old that she is now extinct.
Ladonna tried to trade her husband in for a younger version but she had unknowingly become a sabre tooth tiger.
by The Ray-Jay combo September 07, 2011
An old woman (who's long in the tooth) that hooks up with a young guy.
Did you see Cloris Leachman making out with Jack Black? She's a Sabre Tooth Tiger!
by mrbearsh May 30, 2009
an ancient cougar who tries to pick up really young guys
That was hilarious when that sabretooth tiger was hitting on Tim
by onslaught94 February 08, 2010
When a man is either sexually active, dating, or married to a woman 20 plus years his senior.
Instead of a 30 year old man dating a cougar who is 44 years old. A 30 year old man dating a sabre' tooth tiger who is fifty five.
by lesshizzle May 10, 2011