Sleep well, as in good night. euphemism for "fuck" Get a sleep with mug for your brother-in-law Trump. Symptoms include droopy eyes, yawning, and the desire to lie down. You are very tired and your brain is not functioning at its normal capacity. Very well used phrase in the English - speaking world. You have been awake for 18 hours and are now viewing this useless definition of sleep. go get some. Meaning Sleep well. It's been common at bedtime for many years in the form of " good night, sleep tight, don't let the bedbugs bite", or something like … Can be treated with the ingestion of caffeine. Side … A condition developed from a lack of rest. another way of saying RIP or Rest Easy to a deceased person. Said to someone before they fall asleep.