burst out

verbs

give sudden release to an expression
"We burst out laughing"; "'I hate you,' she burst out"
burst out
is a type of (narrower)
give expression to
"She showed her disappointment"
evince, express, show
appear suddenly
"Spring popped up everywhere in the valley"
burst out, pop out
erupt or intensify suddenly
"Unrest erupted in the country"; "Tempers flared at the meeting"; "The crowd irrupted into a burst of patriotism"
break open, burst out, erupt, flare, flare up, irrupt