puerile

The reception for the visiting team has been predictably hostile, bordering on puerile.

"We say this defamatory, frankly puerile and infantile behaviour by a grown man in respect of these people was, and is, beyond the pale of what is tolerable in society and therefore characterised as criminal."

Never mind the insults the puerile president constantly dishes out, the demeaning nicknames he assigns — like “Newscum” — or the president’s heartless approach to governing.

Even though Trump's reasoning was puerile and uninformed, it wasn't a completely outrageous request in his first term that Europe should pick up more of the tab for their national defense.

It's the people in the pin-striped suits laughing at his puerile insult "comedy" and loving watching him sticking it to the libs.