sit like piffy on a rock cake
To be conspicuous but ignored or left out, especially from a group or activity. (A "rock bun" or "rock cake" is a type of hard cake with currants; what "piffy" refers to is unknown.) Primarily heard in UK. I was excited to go with my wife to her awards ceremony, but I didn't know anyone there and ended up sitting like piffy on a rock cake. After Tommy hit one of the other boys in his class, he was left sitting like piffy on a rock cake during playtime.
sit like piffy on a rock bun
To be conspicuous but ignored or left out, especially from a group or activity. (A "rock bun" or "rock cake" is a type of hard cake with currants; what "piffy" refers to is unknown.) Primarily heard in UK. I was excited to go with my wife to her awards ceremony, but I didn't know anyone there and ended up sitting like piffy on a rock bun. After Tommy hit one of the other boys in his class, he was left sitting like piffy on a rock bun during playtime.
sit tall in the/(one's) saddle
To be or remain proud, stoical, or august in one's manner or composure. Even after two years of a losing war, the general still sat tall in his saddle before his troops. I'll have nothing to do with your schemes or plot. One day, you're going to be locked up and lose everything, and I'll be sitting tall in the saddle when you do.
sit at (someone's) feet
To be in a position of devotion or worship to someone; to pay homage or reverential attention to someone. I've been sitting at the feet of the renowned professor ever since I heard his astounding lecture on quantum mechanics. My brother chose to sit at the saints' feet for the rest of his life, but I do not intend to pursue such a life of the cloth.
sit upon hot cockles
To be impatient. Quit sitting on hot cockles—you'll get your birthday present soon enough.