talking shit, n.All

Talking shit is unwise — mud thrown is ground lost.

Talking shit is the glue of friendship.

Talking shit is revealing of character — you can tell more about a person by what he says about others than you can by what others say about him.

Talking shit is rarely wise — it is always difficult to sling mud with clean hands.

Talking shit is rarely undeserved — it is a sin to believe evil of others, but it is seldom a mistake.