[bert]

Grubering is not Gaffing.

Gaffing is slip of the tongue

Grubering is letting the cat out of the bag, aka spillin’ the beans

[Mr Ramsbotham]

“Grubering” is like the guy who greets his wife at 3 a.m. and says, “I can explain the lipstick on my collar, dear ... I used my shirt to wipe my pecker!”