1. A sorting algorithm where the sorted array is built one entry at the time.
2. When it is unclear which woman is the most attractive, so you "insert" your penis into each vagina in order to determine its warmth, muscularity and general hoo-ha.
1. My data was arriving in bursts, so the best way of getting it in order was using insertion sort.
2. I now have herpes because I performed insertion sort on too many women last night.