tit erection 

when you can screw someone with your tit

It's ok, tit erections only happen to sumair when he has to queef which makes his taint flap.

tit erection by not sumair March 6, 2004

Tierection 

A tie knot tied so tightly it points outward from the shirt collar, forming a semi-erection.

Look at that guy's tie, he's got a tierection!

Tierection by da'man'09 April 27, 2009