big end (plural big ends)
- In a piston engine, the larger end (crankshaft end) of the connecting rod that connects a piston to the crankshaft.
From the sound of that motor, I'd say yer big end's gone, mate.
1951 July, “British Standard Locomotives”, in Railway Magazine, page 441:Except in the case of the largest 4-6-2, not yet in contemplation, use of two [outside] cylinders only was decided on for the following reasons:— […] 2. The split inside big end is a source of trouble at high speeds and powers unless exceptional integrity of maintenance can be guaranteed.
