autobombearse

A colloquial, mildly disapproving verb meaning to "toot one's own horn" — to praise or promote oneself excessively: no dejaba de autobombearse en la entrevista. Informal register, almost always used critically about someone else.

• No dejaba de autobombearse durante toda la entrevista. — He wouldn't stop tooting his own horn throughout the whole interview.
• En redes sociales, muchos se autobombean sin parar. — On social media, a lot of people constantly toot their own horn.
• Prefiero dejar que otros hablen de mi trabajo antes que autobombearme. — I'd rather let others talk about my work than toot my own horn.

Using autobombearse in a neutral or formal register — it's informal and carries a built-in note of mild criticism, closer to "self-promote shamelessly" than a plain "to advertise oneself."