carpet custard Share definition Flag the semi-dry gelatinous goo found on the floor by your other half's PC, usually amongst the crumpled tissues. wtf's all that carpet custard doing there? I just cleaned this fucking floor you wanker! carpet custard by UKP August 21, 2010 0 0 Get merch Get the carpet custard mug. Buy Now — $32.95 See more merch