Whille engaging in sexual activity one or both of the participants are fat,and their belly begins to jiggle/wiggle/slosh(sloshin') around;like waves crashing on the shore.
Although Michael was in very good shape his girlfriend Megan was "SLOSHIN'"
The Urban Dictionary Mug
One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.
Buy the mug