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1.
To talk about something irrelevant, or incorrect.
1. "What did you get up to last night?"
"Oh, just sat round a friends house talking bollocks."

2. "I was out last night and met this bloke who told me he was once an astronaut."
"Woah, did you believe him?"
"No, he was talking bollocks".
by Growkie August 13, 2006