bundle of fun
(Something that is) fun, funny, and pleasant. Sometimes used sarcastically to indicate that someone is unpleasant or not enjoyable to be around. I always enjoy myself when Katie's around—she's totally a bundle of fun! A: "Is Mr. Grant always cranky?" B: "Oh, yeah—he's a real bundle of fun!" Tom is usually such a bundle of fun, but he's been really down lately. I hope he's OK.
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