i need the meaning of (full-blown-trend)....please find the context hereunder
If we make a big deal about it, in a week it'll become a full-blown-trend)

Question

Answer

"Full-blown" means fully developed and complete, as opposed, say, to a trend that was just starting out and not too well-known.
"The two countries had border skirmishes for weeks, but it has recently developed into a full-blown war."

Answer

in context it means that trend that they are talking about will become very very popular / widespread in a week's time

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