Anchor a mini band under your knees for a no-weights pump.

Squeeze hard at the top, the band's tension peaks where it counts most.
Kneeling on the band turns your own bodyweight into the anchor, and curling against it gives you a resistance curve that is the mirror image of free weights, light at the bottom and heaviest right at the top squeeze. That peak contraction loading is exactly where dumbbell curls go easy on you. No bench, no weights, just pinned elbows and a band, which makes it a legit pump tool anywhere.
They load the opposite part of the rep, bands are hardest at the top where dumbbells are easiest. Neither replaces the other, which is why pairing them covers the whole curl.
Yes, drifting elbows turn the curl into a front raise and unload the biceps. Pin your elbows to your sides and make the forearm the only thing that moves.
Kneel on more of the band to shorten the working length, or loop it doubled. Shorter band means tension arrives earlier and climbs harder.




