What is Blooop!?
1.
An exclamation used to describe one's overly enthusiastic response to an everyday or mundane occurance. Also an example of a spontaneous retort or response to an attempted put-down or criticism.
(Origin: the sound of turd as it splashes into the toilet water)
Ethan-"Hey, Jennifer; have you seen my keys?"
Jennifer-"Blooop!" (points to keys in very obvious location on the table)
See