Also means
hit song (informal)
Usage Note
Tube in its literal sense is a hollow cylinder (un tube de dentifrice = 'a tube of toothpaste'). Colloquially, un tube means a chart-topping hit song — a use that has been common in French pop culture since the mid-20th century. À pleins tubes means 'at full blast' (of sound).
Examples
"Cette chanson est le tube de l'été."
Natural Translation
That song is the hit of the summer.

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