Poca Mierda
A backhanded compliment used to insult someone who mistakenly accepts it as praise. While it sounds like you are saying they are not insignificant, the hidden meaning is that they are not a little piece of shit because they are actually a massive one.
Dude you did it, I knew you were not Poca Mierda... (implying: you are a giant pile of it).
Automatically translated from Spanish