"Time of dere" is a period when one is in love, or feels attracted to someone. For instance, when someone falls deeply in love with a certain idol group or actor, they might post "I've entered the time of dere." During the time of dere, anything the object of affection does will conjure feelings of love in the subject. Even situations that others would find strange will make the time of dere subject fall more deeply in love...
Fangirl: "omg junkook is so fucking amazing, I think I've entered the time of dere"
Fangirl:*proceeds to ship junkook with the rest of BTS with online games*
Fangirl friend:"Ew, that's totally messed up"
This example is very broad
Fangirl:*proceeds to ship junkook with the rest of BTS with online games*
Fangirl friend:"Ew, that's totally messed up"
This example is very broad
by Neko God June 2, 2018
Get the time of deremug. 
A spin off of Tsundere, where a woman is as prideful as a knight, but gets flustered when treated like a woman
by Sacrifice Everyone March 7, 2021
Get the Knight-Deremug. A word with no meaning, typically used in central Iowa, that only white men say when trying to sound gangster. Typically added at the end of a sentence.
by Cubdub June 10, 2013
Get the Dere Foimug. by NOSPA January 27, 2022
Get the Deree Griffinsmug. 