Bitetremar

Bitetremar is equal to \(f_{\psi(M\uparrow\uparrow2)}(10)\). The term was coined by Denis Maksudov.

Etymology
The 3 parts of the name, "bi", "tetr", and "emar", mean \(2\), \(\uparrow\uparrow\), and "M". So the full name indicates the ordinal index of the number.