It's the once-over when leaving a hotel/friends house/somewhere where you won't be back for a while. Typically performed by one assigned person. For all those times when you think, "Man! i'm such an idiot! I forgot my ..."
"You take the bags to the car, and i'll do the idiot check."
When finance content creators rent out fancy cars and flexcash to seem richer than they really are in order to promote and sell their “get rich quick” courses.
The use of the word "blue" to refer to sexually explicit content was first recorded in Scotland in 1824. "Blue" meant "lewd" because prostitutes dressed in blue gowns.