to lack sleep; to be sleep-deprived
to make up for lost sleep
1.after-sensation2.after-impression
beauty sleep (before midnight)
although I don't understand it, it seems pretty awesome (Internet slang)
1.amblygeustia2.loss of food taste
1.to go back to sleep (instead of rising up in the morning)2.to sleep in
1.(lit.) so exhausted (by difficulties in a relationship) that one feels one could never fall in love again (Internet slang)2.disenchanted with sth
(linguistics) eye dialect