A phrase that has the same meaning as the phrase "It's Water Under the Bridge"....I guess. You should use this after an argument. It means that something happened in the past and can`t be changed. You see, once you squeeze toothpaste out of it's proper
tube, the toothpaste cannot go back into the
tube. You can
get a toothpick and try to push it back into the
tube, but I'll be Goddamned if it wont go back, and if some of it does you have, at best, an awful mess.
1.
Don't worry about what you said it's toothpaste out of the
tube.
2. So what if you lost your v card, it's toothpaste out of the
tube.