My mom came home when I was nailing Susan in the ass!

For example you are out with the boys on a Saturday night at a seedy Irish pub necking stubbies with the boys, it's about 2 am and your toey as a Roman sandle. Your standards are very weak at this time and you settle for the easiest target which is usually a larger girl, an older one, or one with red hair and many freckles. Once you have picked up this fine young lady you then take her back to your mates and give her a good nailing, once done you send your mates a text message saying nailed.