The action of inserting a flacid or semi flacid penis into ones sexual partner using a thumb or finger in an attempt to engage in coitus. The action is usually performed after the consumption of a considerable amount of alcohol and is regarded as a token effort at sexual intercourse.
"I was absolutely twatted and knew that there was no way that I could possibly perform, despite the fact that she was absolutely stunning and horny as a goat. I knew that if we didn't have sex she would be upset but I was drunk as a sailor. Therefore the only possible course of action was to thumb in a softie.
When you're doing a chick in the ass and she gets diarrhea and it squirts out all over the place. Kind of like when you stick your thumb in the end of a hose nozzle and the water shoots out forcefully.
Rich: "So how was fuckin Lauren last night? I could hear it going down in the living room."
Adam: "Well it was good till I stuck it in her ass. Then i got the old Thumb in the Hose Nozzle action and spent the rest of the night cleaning up your leather couches."