Wiktionary
laugh a minute
n. (context idiomatic English) A funny thing or person.
Usage examples of "laugh a minute".
On the two occasions I had seen her last August I underwent several complete identity-reorganizations, settling finally somewhere between the pained, laconic, inscrutable type and the knowing, garrulous, cynical, laugh a minute, yet something demonic about him, something nihilistic, muted death-wish type.
He had been funny, all right, a laugh a minute, but in the end he had outgrown the nightmares that were on the dark side of all those laughs.