buttload

A regional English measure of capacity of a heavy cart (a butt), containing 6 seams, or 48 bushels, equivalent to 384 gallons.

BUTT LOAD: about six seams.

The farmers near the fishing towns in the same district [Cornwall] likewise buy the refuse of bruised and small pilchards, which are rejected as unfit for curing or the market, and are called caff, four cart-loads of twelve bushels each being considered as the quantity proper for an acre. […] The butt-load formerly cost about 9s. or 10s. but they now fetch 15s. or 20s. the load.

A large amount carried in a butt.

We spent all day Sunday and picked up a buttload of pecans.

Any large but unspecific amount.

You can collect a metric buttload of data about user activity on your site without too much effort.

Anyway, they are paying me a buttload of money to do this series, and I want to share my good fortune with you and that's that.