Talk cock, v.

Etymology: < English idiom a cock-and-bull story < similar meaning to the American slang: poppycock.

1. To engage in idle chatter.

Source: Twitter

2. Exaggerated or foolish talk; nonsense.

1937 C. Day Lewis Starting Point iii. 52 ‘If I hadn't let Mackenzie through that time, we'd have won.’ ‘Don't talk cock. You played a damned good game.’ (source: OED)

Source: Twitter