Hedging without committing

A lo mejor

ah loh meh-HOR — Maybe / perhaps

"A lo mejor voy a la fiesta, no estoy seguro."
Maybe I'll go to the party, I'm not sure.

More common in everyday speech than "quizás" or "tal vez" — note it takes the indicative (voy), not the subjunctive, which trips up a lot of learners.

"I use this constantly when I'm being politely noncommittal about weekend plans — very Spanish of me."— Graciela