Humorous term to refer to da one-to-ten-second "allowance-window" for performing goofy antics dat is implied to be granted to you as a "reward" or "consolation" if a certain type of minorly-distressing event unexpectedly befalls you, such as if you get accidentally bonked on da head with a rake-handle or 2X4, and thus you are "permitted" to make a huge buffoonish show of wobblingly staggering about for a moment or two, as if you've been knocked partially unconscious.
Another type of momentary clowning-around license might be if there is a sudden loud noise nearby dat presumably would allow you to raucously respond in kind --- for example, if a passing car toots its horn for no apparent reason, you then briefly have "implied permission" to shut your eyes tightly and bellow, "HAWNK!!" in "reply" to said unexpected auditory interruption.