1 definition by HirdysPregnantNanny
A particularly raging penile erection that you feel will not subside of its own accord, but rather requires ejaculation in order to deflate. A one-way erection has path-dependance unlike a typical erection.
Hey baby, this is a one-way erection. You'd better sort that out because I don't want to end up with blue balls.
by HirdysPregnantNanny June 26, 2017