A good example of a 'tish fact' or something that could well be called as such would be to issue a statement without 100% knowing if it is true, then being immediately corrected by a peer only to retort with a similarly farcical background piece of information to support the original fallacy. This could be seen as the opposite of 'digging oneself out of a hole', or rather to make a social 'hole' bigger by continuing to support an argument with lies or further embarrassing statements. Best avoided.

Example:
Person 1: "The lunar landings took place in 1978"
Person 2: "No, Apollo 11 landed on the moon in July 1969"
Person 1: "No it was definitely 1978 as Neil Armstrong is a distant relation of mine"

Person 1 has committed him/herself to a line of argument that they cannot support or realise they may have said in error, but only served to compound with a second statement of complete crap! Tish Fact!

phone: why don’t you go to sleep tommy it’s 2 in the morning?
tommy:why don’t you die you dumbazz