This originated in the 1975 movie Jaws. The group setting out to kill the great white shark are told, “You’re gonna need a bigger boat.” [Insert something here about the movement from "you" to "we" because of the asynchronous nature of Internet dialogue...]
Variations on X returned by snowclone.pl include cessna, stoat, blimp, litter box, skillet, blanket, park, rug, roach motel, and console, among many others. People seem most comfortable with single-word Xs, and single-syllable Xs are even better, so that the phrase more easily recalls the Jaws usage.
This is a pretty unidiomatic expression, so it is quite possible for people to use it without making any reference to taking down overlarge sharks. The instances I’ve investigated for context confirming intentional allusion to Jaws do favor it, though this confirmation is likely biased because I searched using “gonna” instead of “going to.”