He's dropped a bollock. He's made a mistake. (i.e. he's made a schoolboy error)
You're gonna get a bollocking now.
You're in for a right telling off (i.e. kick in the balls)
1. n. testicle
2. v. The act of a fat person running in a lopsided manner
3. v. tell off
4. Bollocks adj. - not true, rubbish
1. "ouch he only gone twatted me in the bollocks guvn'or"
2. He was bollocking along at a fair old pace in an attempt to escape the rozzers.
3. Dr. Percy have the pupil a right bollocking for not handing in his work
4. "Thats plainy bollocks good sir!"