But I did purchase once, for all obv reasons of poifect labelling.. a small aerosol can of a substance marketed (in the Box-style of sartorial elegance and cuthless patter) -

Bullshit Repellent

(I did, on one occasion accompany/lead a candidate for this service to its repository, in the basement. The mere miming of a button press constituted my entire rebuttal to a certain hanging-debate. Love. It.)