A Gargantuous Trickle ?
WAIT WAIT !!!!!!!!..... A big, biggy, brobdingnagian, colossal, elephantine, enormous, giant, gigantic, heavy, huge, humongous, immense, jumbo, leviathan, mammoth, massive, monstrous, monumental, mountainous, prodigious, super-colossal, super-duper, thumping, titanic, towering, tremendous, vast, whopping TRICKLE