A person (in most cases a man) who acts rough and/or lustful in public, but when in sexual intercourse, is tender and caring. It can also be used vice versa.
Finding a hookup using the Tinder app that looks attractive on there profile picture and inviting them over, only to find out that they are less than appealing (and STILL hooking up with them).
"Dude I got in such a Tinder-bender last night. I found this smoking hot chick on Tinder and invited her over. When she got there, she looked like she fell from and ugly tree and hit every branch on the way down.... and I STILL hit it."