Thisisacatchy song

You might have seen this video before, but I'm just using it as a) a springboard in to the next video and b) because I find it so catchy. Then there's this one, which has been cut together so that it becomes a little cheekier. It's to do with pirates and women. About two thirds of the way through, the word 'thisisaknife' can be heard. Can you hear it?