when you are in a blanket all day and refuse to leave it
or
when people used to play guitar hero and covered half their screen with a blanket to form a false hyperspeed
"yo imma go blankie mode"
"it's better with a heated blanket"
"that's why I have one."
"fuck it, blankie mode time"
*proceeds to cover half the screen with a blanket*
"ah, perfect"