How about 3^...(3^^^3 up arrows)...^3?
Hmm. “Three to the ‘three to the pentation of three plus two’-ation of three”. Alternatively, “big” would also work.
How about 3^...(3^^^3 up arrows)...^3?
Hmm. “Three to the ‘three to the pentation of three plus two’-ation of three”. Alternatively, “big” would also work.