When two people agree that one (or both) parties can "pull up" to the other person's house at any time unannounced. This is usually between two parties that are romantically involved, and can be just for sex or because they are in a committed relationship.
"Jason and are at pull up status, which is totally fine for now." OR "Last night Mark just showed up at my door with this big grin on his face, I had no idea he was coming over, guess he thinks he reached pull up status."