Collins Chinese Dictionary Plus (3rd edition), 2011:
蹭
cèng 动
1
(=摩擦) rub
- 他在门(門)垫(墊)上把鞋底的泥蹭掉了。 Tā zài méndiàn shang bǎ xiédǐ de ní cèngdiào le. He rubbed the mud off his shoes onto the doormat.
2
(=沾上) smear
- 他离(離)得太近,袖子上蹭到了油漆。 Tā líde tài jìn, xiùzi shang cèngdàole yóuqī. He got too close to the wet paint and got his sleeve smeared.
3 (指速度) creep along;
(pt, pp crept)
(pt, pp crept)
- 路上很挤(擠),她一点(點)一点(點)地往前蹭。 Lùshang hěn jǐ,tā yīdiǎn yīdiǎn de wǎng qián cèng. The roads were packed, so she crept along at a snail's pace.
4
(=占便宜) scrounge
- 她已经(經)工作了,可是还(還)去父母家蹭饭(飯)吃。 Tā yǐjīng gōngzuò le, kěshì hái qù fùmǔ jiā cèng fàn chī. She has a job now, but still goes back to her parents' house to scrounge food.