1 definition by Oohmydadbro
The process of shiting on the floor in the middle of a mosh pit. The ensuing chaos that follows results in the floor being covered in a thick layer of excrement, therefore, griming it up
After peer pressuring our friend Ben to no end, he jumped into the crowd and started Grimin it up. A few short minutes later he was escorted out by authorities
by Oohmydadbro January 16, 2023