When the phallus is in that often uncomfortable state of half-formed erection. Usually softens if the possesser requires it to be hard, and vice versa if he is in an uncomfortable situation for an erection.
Wearing tight jeans, Bob sucks in his stomach in the hopes that his semirection retreats into placcid-hood.
Sem-ection.
This is the same as an Eremi and refers to your penis when it is between the semi-hard stage and a fullerection.
It's not quite a semi and not quite an erection - it's a semection.
Example 1:
Girl: "Have you got a hard on!?"
Guy: "No"
Girl: "Yes you do!! It's bigger than a semi"
Guy: "I have a semection!"
Example 2:
"Lying beside this girl in bed it may have looked like I was semi'd up but I had a full semection on the go, if she was naked I would've had an erection."
When a man sees some-one hot and gets a half erection
When your penis grows bigger but it doesnt go upwards like a normal erection and is therefore a half erection giving the name semi-rection
Dude 1: Man that girls hot!
Dude 2: Shes ayt ive only got a Semi-rection
Dave: Man my balls are so small so im going to try to get a Semi-rection to make it look bigger.