The whole reason that laxitive companies make money.

1- When your shit is stuck up your ass hole, hoping it will finally let out.
2- Kinda feels like giving birth out of your ass.
3- Hurts like fuck.
4- If you push too hard, your head will blow up.
5- The total opposite of diarrhea.

Suppose you haven't taken a shit for a while and every time you go to the bathroom your poop does not budge because it is firmly stuck and rock hard. You strain yourself but still you cannot get the turd out and you tear your butt hole while you are crying and trying to push it out. This feeling of extreme pain and not being able to pass shit is constipation and one calls you "constipated".

When you want to go poopy, dream about going poopy, and pray to go poopy, but your ass says otherwise...
antonym of diarrhea

When the train won't come out of the tunnel.

When your poo grows attachment issues and acts as a fetus

When it feels like you have a tennis ball sized rock in your anus and you just want to relieve yourself of it, but when you sit on the toilet and strain it doesn't come out because it's rock hard and your anus cannot stretch wide enough for it to come out without tearing. Also the reason why I have a hemroid that I'm severely self conscious about & I refuse to have sex with anyone until it shrinks.