A situation where your sleep patterns have adjusted to a new time zone, but your bowel movements are still in the previous Timezone. This can be problematic for people who prefer to have natures calling before their morning shower.

The horror and shame of getting old; especially when approaching the age of gray hair and arthritis.

when your fucking a girl in the ass and the lube starts to wear off

When you move penis in and out inside ass and the ass doesn't move in the same rhythm, it's called ass lag.