A word that means the same thing as promise, pinky swear, swear on my life, ect. what you tell someone when you want to assert sincerity regarding a promise.
"Do you promise to meet me at the mall at 2 o'clock, Pledge allegiance ok?" "Ok,ok, I pledge allegiance." (or,) "What happened to you? you said you would not leave me alone at the party, but you did! "Did I pledge allegiance?" "Um, no. But..." "But nothing. Did I pledge allegiance?" "No..," "Alrighty then."